Affiliate Keyword Research: How to Find Keywords That Actually Make Money

Most affiliate keyword research starts with the wrong question.

People open a keyword tool, type in their niche, sort by search volume, and start saving anything with a low difficulty score.

That gives you a spreadsheet.

It does not necessarily give you a strategy.

The real question is:

Which searches give my website a realistic opportunity to attract the right person at the right stage of a buying decision?

That changes how you research keywords.

You stop looking only at:

• search volume
• keyword difficulty
• CPC
• traffic estimates

And start looking at:

• search intent
• commercial value
• SERP weakness
• audience fit
• topical relevance
• competition quality
• monetization opportunities
• how the keyword fits into the rest of your site

That is how I approach affiliate keyword research.

Not as a hunt for isolated keywords.

As a way to discover markets, problems, buying decisions, and content opportunities.

What Is Affiliate Keyword Research?

Affiliate keyword research is the process of finding searches you can target with content that attracts people interested in products, services, or problems related to your niche.

Some keywords are directly commercial.

For example:

• best adjustable dumbbells
• best garage shelving
• portable power station for camping
• robot vacuum for pet hair
• espresso machine under $500

Others happen earlier in the buying journey:

• adjustable dumbbells vs fixed dumbbells
• how deep should garage shelves be
• how big of a power station do I need
• are robot vacuums worth it
• what size espresso machine do I need

And some are almost entirely informational:

• how to organize a small garage
• how to clean adjustable dumbbells
• how does a portable power station work

A strong affiliate website usually needs all three.

Commercial pages give you opportunities to earn commissions.

Informational pages build topical authority, attract links, answer questions, and introduce people to products naturally.

The goal is not to find only “money keywords.”

The goal is to build a useful website around a market where commercial opportunities exist. If you are still defining that market, start with how to choose an affiliate niche.

Stop Chasing Search Volume

Search volume is useful.

It just isn’t the whole story.

A keyword getting 10,000 searches per month sounds more exciting than one getting 150.

But consider these two searches:

home gym

versus:

best squat rack for low ceilings

The first is enormously broad.

Someone searching it could be looking for:

• inspiration
• gym memberships
• equipment
• workouts
• photos
• home gym designs
• flooring
• complete gym packages

The second search tells you much more.

The person:

• probably owns or plans to build a home gym
• has a low ceiling
• needs a squat rack
• is comparing products
• has a specific constraint
• may be close to purchasing

I’d rather rank #2 for the second query than #43 for the first.

Especially on a newer affiliate site.

Search volume should help you understand demand.

It should not decide what you publish.

The Four Types of Affiliate Keywords

I generally divide affiliate keywords into four groups.

1. Best-of Keywords

These are the classic affiliate searches.

Examples:

• best garage shelves
• best espresso machine
• best dog ramps
• best adjustable dumbbells
• best camping power station

They work because the searcher has already decided they probably want a product.

Now they are deciding which one.

These can be extremely valuable.

They can also be extremely competitive.

The mistake is assuming every article needs to target them.

Instead of only targeting:

best garage shelving

look for variations:

• best garage shelving for heavy storage
• best garage shelving for small garages
• best freestanding garage shelving
• best garage shelves under $200
• best garage shelving for renters

The more specific the search, the more clearly you understand what the user needs.

2. Comparison Keywords

These are some of my favorite affiliate keywords.

Examples:

• adjustable dumbbells vs fixed dumbbells
• garage cabinets vs shelves
• propane heater vs electric heater for garage
• power rack vs squat stand
• Jackery vs EcoFlow
• treadmill vs walking pad

The person already understands the category.

They are deciding between approaches, products, or brands.

Comparison searches are valuable because they sit close to a decision.

Don’t limit yourself to brand-vs-brand comparisons.

Category comparisons can be even better.

For example:

• overhead garage storage vs wall shelving
• rubber gym flooring vs horse stall mats
• storage cabinets vs open shelving
• portable power station vs generator

These searches often have less competition than broad “best” keywords.

3. Product and Problem Keywords

These happen when someone knows the problem but not necessarily the exact product they need.

Examples:

• how to heat a detached garage
• storage ideas for a one-car garage
• how to get an old dog into an SUV
• home gym equipment for low ceilings
• backup power for refrigerator during outage

These can be extremely valuable.

Someone searching:

how to get an old dog into an SUV

may eventually buy a dog ramp.

But they haven’t necessarily decided that yet.

Your article can help them understand the options.

That creates a much more natural path to an affiliate recommendation.

4. Informational Keywords

These do not always lead directly to a purchase.

Examples:

• how deep should garage shelves be
• how long do adjustable dumbbells last
• where should I put a squat rack
• how much weight can garage shelving hold
• what size power station do I need

These still matter.

They help your website become useful.

They create internal-link opportunities.

They can attract backlinks.

They can introduce readers to commercial content.

And they help you build authority around an entire topic rather than publishing nothing but product roundups.

Start With the Buyer, Not the Keyword Tool

Before opening any SEO tool, think about your audience.

Ask:

What are they trying to buy?

What are they trying to fix?

What are they worried about?

What are they comparing?

What don’t they understand?

What limitations do they have?

What mistakes are they trying to avoid?

Suppose your niche is garage storage.

Your audience may care about:

• limited space
• weight capacity
• moisture
• cost
• installation
• ceiling height
• parking space
• renters vs homeowners
• storing tools
• storing bikes
• storing seasonal items

Those problems create keywords naturally.

For example:

Limited space:

• garage storage for small garages
• narrow garage shelving
• overhead storage for one-car garage

Weight:

• heavy-duty garage shelving
• garage shelving weight capacity
• strongest garage shelving

Budget:

• cheap garage shelving
• garage shelves under $100
• budget garage storage ideas

Once you understand the buyer, keyword research gets much easier.

Use Seed Keywords to Discover the Market

Start broad.

Suppose you’re building a website about home gyms.

Your initial seed terms might be:

• squat rack
• dumbbells
• weight bench
• home gym flooring
• barbells
• weight storage
• resistance bands
• cardio equipment

Now expand each one.

Squat rack might reveal:

• squat racks for low ceilings
• folding squat racks
• squat rack for small spaces
• squat rack vs squat stand
• power rack vs half rack
• squat rack under $500
• squat racks for garages

You’re not looking for one keyword.

You’re uncovering an entire topic cluster.

Look for Modifiers

Modifiers are words people repeatedly add to product searches.

They’re incredibly useful for finding long-tail affiliate keywords.

Price Modifiers

• under $50
• under $100
• under $500
• cheap
• affordable
• budget
• premium

Examples:

• best adjustable dumbbells under $500
• affordable garage cabinets
• budget espresso grinder

Audience Modifiers

• for beginners
• for seniors
• for kids
• for women
• for tall people
• for families
• for renters

Examples:

• best golf clubs for beginners
• dog ramps for senior dogs
• camping gear for families

Constraint Modifiers

These are especially good.

• small spaces
• low ceilings
• apartments
• garages
• cold weather
• hot climates
• heavy users
• limited mobility

Examples:

• squat rack for low ceilings
• freezer for hot garage
• treadmill for small apartment

Constraint keywords often have strong intent because the shopper can’t simply buy anything.

They need something that fits their situation.

Feature Modifiers

• foldable
• waterproof
• adjustable
• portable
• cordless
• heavy-duty
• compact
• quiet

Examples:

• quiet garage door opener
• compact power rack
• portable generator for RV

Use-Case Modifiers

• for camping
• for travel
• for home
• for garage
• for RV
• for apartment
• for basement

These often reveal entire sub-niches.

Search for “For” Keywords

One of the easiest affiliate keyword patterns is:

product + for + specific situation

Examples:

• treadmill for small apartment
• squat rack for low ceiling
• dog ramp for SUV
• power station for camping
• heater for detached garage
• shelving for storage bins
• espresso machine for small kitchen

These searches tell you exactly what the user wants.

They can also expose weaknesses in broad product roundups.

A generic article about the “10 Best Squat Racks” may not adequately answer someone who only has an 80-inch ceiling.

That is your opportunity.

Look for “Vs” Keywords

Another easy pattern:

X vs Y

These can include:

Brand vs brand:

• Bowflex vs PowerBlock
• Jackery vs EcoFlow

Product vs product:

• walking pad vs treadmill
• squat stand vs power rack

Approach vs approach:

• garage cabinets vs open shelving
• electric heater vs propane heater

Material vs material:

• metal shelving vs plastic shelving
• rubber flooring vs foam flooring

These keywords often have obvious commercial intent.

They also make useful internal links to broader buying guides.

Look for “Alternatives” Keywords

People searching for alternatives usually already know the market.

Examples:

• PowerBlock alternatives
• Peloton alternatives
• Gladiator garage storage alternatives
• Jackery alternatives

These searches can be valuable because the user may already be prepared to spend money but hasn’t committed to a brand.

Just make sure there are legitimate alternatives worth discussing.

Don’t force an alternatives article simply because a keyword exists.

Look for “Worth It” Keywords

Examples:

• adjustable dumbbells worth it
• overhead garage storage worth it
• walking pad worth it
• power station worth it
• garage cabinets worth it

These searches sit directly between information and purchase.

The user knows the product exists.

They’re trying to justify the purchase.

These can be fantastic affiliate articles.

Find Questions That Lead to Products

Some of the best affiliate content doesn’t look commercial at first.

Consider:

How do I store bikes in a small garage?

That article could naturally discuss:

• wall hooks
• vertical bike racks
• ceiling racks
• freestanding racks

The content solves the problem.

The products are part of the solution. Before recommending them, check the available affiliate programs and their terms.

That’s much better than forcing affiliate links into unrelated informational content.

SERP Weakness Matters More Than Keyword Difficulty

This is one of the biggest concepts behind how I evaluate keywords.

SEO tools might tell you a keyword has a difficulty score of 18.

That does not necessarily mean it is easy.

Another keyword might have a difficulty score of 45 but have weak search results.

You need to actually look.

Search the keyword.

Ask:

How good are these results?

Look for signs of weakness.

Reddit Threads Ranking

Reddit ranking is not automatically a sign that a query is easy.

Sometimes Reddit is genuinely the best answer.

But frequent forum and Reddit results can indicate that traditional publishers haven’t created a strong enough page for the query.

Pay attention when several community results rank.

Generic Sites Ranking

Suppose you’re researching garage storage and the results include:

• a general lifestyle publication
• a news website
• a massive product review site
• Pinterest
• Reddit

but no strong garage-storage specialist.

That’s interesting.

A focused site may be able to serve that audience better. Our niche validation guide explains how to check whether smaller sites can compete.

Weak Intent Match

This is huge.

Search:

best squat rack for low ceilings

If most results are generic “best squat racks” articles with one low-ceiling option buried halfway down the page, the intent may be underserved.

Your entire article can focus on low ceilings.

That’s a stronger result.

Old Content

Look at publication dates.

A five-year-old article is not automatically bad.

But if products, pricing, technology, or availability have changed significantly, fresher content may have an advantage.

Thin Content

Sometimes the ranking page simply does not answer the question well.

It may:

• give a short answer
• provide no comparisons
• lack measurements
• omit important limitations
• recommend unavailable products

Those are opportunities.

Don’t Automatically Run Away From Big Sites

A SERP full of large domains doesn’t always mean you can’t compete.

Look at the specific pages.

Sometimes huge websites rank because they have authority, not because their page is particularly good.

Ask:

Could I create something substantially more specific?

Could I answer the intent better?

Could I provide original measurements?

Could I focus on one audience?

Could I build supporting content around this topic?

Could I provide a useful calculator or comparison table?

You’re not trying to beat the entire domain.

You’re trying to create a better answer for one search.

Study Forums Before You Write

Search Reddit and niche forums.

Not because you should copy them.

Because users will tell you what matters.

Suppose you’re writing about storage racks.

Community discussions may repeatedly mention:

• shelves bowing
• plastic cracking
• unstable racks
• difficulty assembling them
• actual dimensions being different from advertised
• trouble fitting storage bins
• concerns about moisture

Those details can improve your article significantly.

Keyword research tells you what people search.

Community research tells you why they care.

Use both.

Look at Autocomplete

Google autocomplete can reveal useful long-tail variations.

Start typing:

best garage shelving…

You may see searches related to:

• heavy duty
• small spaces
• totes
• wood
• metal
• adjustable

Do the same with:

garage shelving vs…

garage shelves for…

garage storage without…

how to store…

You can discover dozens of ideas quickly.

Mine “People Also Ask”

Questions often become supporting articles.

For a product category, you may see questions like:

• How deep should garage shelving be?
• Is metal or plastic shelving better?
• How much weight should garage shelving hold?
• Should garage shelves be anchored?

These can become individual informational pages.

They can then link naturally into your commercial article.

Use Competitors for Discovery, Not Copying

Competitor research is useful.

But do not make your content plan:

“Export competitor keywords and write all of them.”

Instead ask:

What topics do they cover?

What are they missing?

What audiences aren’t they serving?

Where are they too broad?

What content gets their traffic?

Which pages attract links?

Which topics have several weak competitors?

You want to understand the market.

Not clone a website.

Build Topic Clusters

Don’t save keywords as one giant list.

Organize them.

Suppose your niche is affordable garage storage.

A cluster might look like:

Garage Shelving

Commercial:

• best garage shelving
• best heavy-duty garage shelving
• garage shelves for storage totes
• best budget garage shelves

Comparisons:

• metal vs plastic garage shelving
• garage cabinets vs shelving
• freestanding vs wall-mounted shelves

Informational:

• how deep should garage shelves be
• how high should garage shelves be
• how much weight can garage shelves hold
• how to anchor garage shelves

Now you have a topic.

Not just four random affiliate articles.

One Keyword Doesn’t Always Mean One Article

Google increasingly understands related searches.

You probably don’t need separate articles for:

• best shelving for small garage
• best garage shelves for small spaces
• best shelves for tiny garage
• compact garage shelving

Those likely belong on one strong page.

The goal isn’t to publish as many URLs as possible.

The goal is to satisfy distinct search intents.

Ask:

Would someone searching these terms expect the same answer?

If yes, they probably belong together.

But Don’t Combine Different Intent

On the other hand:

best garage shelving

and:

how to build garage shelves

should probably not be the same page.

One person wants to buy shelving.

The other wants to build it.

Same topic.

Different intent.

This distinction is one of the most important parts of keyword research.

Prioritize Keywords by Opportunity

Once you’ve collected keywords, you need to decide what to publish first.

I would evaluate five things.

1. Relevance

How closely does this keyword fit your site’s core topic?

Stay focused early.

A tightly connected website is easier to build than one wandering between unrelated subjects.

1. Intent

Does the keyword bring someone you actually want?

A low-volume buyer keyword can be extremely valuable.

1. SERP Weakness

Can you realistically create a better result?

This should carry a lot of weight.

1. Monetization

Can the search naturally lead to products, services, or other revenue?

Not every page needs to monetize directly.

But your overall topic cluster should.

1. Strategic Value

Does this article support another important page?

An informational article may only get 200 visits per month.

But if it strengthens your best commercial topic and attracts links, it may be very valuable.

A Simple Keyword Opportunity Score

You can score each keyword from 1 to 5 across:

Intent

1 = little commercial relationship

5 = obvious buying intent

SERP weakness

1 = extremely strong specialist results

5 = obviously underserved results

Topical relevance

1 = loosely related

5 = core to your site

Monetization

1 = difficult to monetize

5 = many relevant products or offers

Content advantage

1 = nothing meaningful you can add

5 = you have a clear way to create a better result

Total the score.

A keyword scoring 21/25 may deserve more attention than a massive keyword scoring 11/25.

The exact numbers don’t matter.

The framework forces you to think beyond search volume.

Find Your Striking-Distance Opportunities

Once your site starts getting impressions, keyword research changes.

Google Search Console becomes one of your most useful research tools.

Look for queries where you’re already ranking around:

• position 8–20
• position 20–40
• sometimes even 40–60 if impressions are meaningful

Google is already testing your page for those searches.

Ask:

Does the existing page adequately answer that query?

If yes:

Improve it.

Add a relevant section.

Strengthen internal links.

Add original information.

If no:

The keyword may deserve its own page.

This is one of the easiest ways to let actual search data guide your content strategy.

Pay Attention to Queries You Didn’t Target

These can be incredibly valuable.

Suppose you wrote an article about garage shelves and Search Console shows impressions for:

garage shelving for storage totes

You didn’t specifically target it.

But Google sees your page as relevant.

Investigate the SERP.

Maybe that’s a fantastic standalone article.

Your own impressions can reveal niches within your niche.

Build Commercial and Informational Content Together

A healthy affiliate cluster might look like:

Commercial

Best Garage Shelving for Storage Totes

Comparison

Garage Cabinets vs Garage Shelving

Informational

How Deep Should Garage Shelves Be?

Informational

How Much Weight Can Garage Shelving Hold?

Informational

Best Spacing Between Garage Shelves

Commercial

Best Heavy-Duty Garage Shelving

All of these pages support each other.

The reader gets useful information.

Google gets clearer topical context.

And your commercial pages are no longer isolated islands.

Think in Buyer Journeys

A person may search:

how to organize a garage

Then:

garage cabinets vs shelves

Then:

best garage shelving

Then:

Gladiator shelving review

Those are four different keywords.

But they’re one customer journey.

Build content for the journey.

Early-stage:

How to Organize a One-Car Garage

Middle:

Garage Cabinets vs Shelving

Commercial:

Best Garage Shelving Systems

Decision:

Specific Product Review

That’s much more useful than treating every keyword independently.

Don’t Ignore Zero-Volume Keywords

Keyword tools estimate search demand.

They do not know every search that happens.

Specific queries may show:

0 searches

10 searches

20 searches

and still produce traffic.

Long-tail keywords also often rank for dozens of similar searches.

For example:

best garage shelving for 27-gallon totes

may show very little volume.

But people absolutely have that problem.

If the SERP is weak, the article fits your niche, and the buying intent is obvious, I would not automatically ignore it.

Don’t Build Your Site Around Keyword Difficulty Scores

Keyword difficulty can help with prioritization.

But it is not a verdict.

Most difficulty metrics rely heavily on backlink profiles.

They often struggle to measure:

• intent mismatch
• poor content quality
• weak topical relevance
• outdated results
• community-heavy SERPs
• whether your article could be significantly more useful

Always inspect the SERP yourself.

Think About Revenue Per Visitor

Not every visitor has equal commercial value.

Suppose:

Keyword A generates 5,000 visits.

The products involved cost $20.

Keyword B generates 500 visits.

The products cost $1,000.

Keyword B could potentially be more valuable.

Likewise, some SaaS affiliate programs pay recurring commissions.

Some physical-product programs pay low percentages but convert frequently.

Use traffic estimates as one input.

Consider the economics of the niche too.

Create Content That Deserves to Rank

Finding a weak SERP is only the beginning.

You still have to create something better.

That might mean:

• personally testing products
• collecting specifications
• comparing dimensions
• analyzing pricing
• talking to users
• surveying communities
• photographing products
• building calculators
• creating original tables
• collecting manufacturer data
• documenting your experience

For example:

Instead of writing another generic:

Best Garage Shelves

you might compare:

• actual shelf dimensions
• maximum advertised load
• price per shelf
• number of storage bins each holds
• assembly method
• footprint
• adjustability
• warranty

Now your article does something.

Build Linkable Content Around Your Keywords

Not every keyword should exist purely to make affiliate revenue.

Some pages should attract references.

Examples:

• statistics
• original research
• databases
• calculators
• studies
• surveys
• industry resources

Imagine publishing:

Garage Storage Bin Size Database

or:

Home Gym Ceiling Height Calculator

or:

Portable Power Station Runtime Calculator

Those can support your commercial content while giving other websites a reason to link to you. For an example of a useful research asset, browse the scored niche database.

Don’t Publish 100 Articles at Once

Keyword research often produces excitement.

You suddenly have 500 ideas.

That does not mean you need 500 pages.

Start with one important topic cluster.

For example:

Garage Shelving

Publish perhaps:

• one strong commercial pillar
• two comparison articles
• five useful informational articles
• one original resource

Then expand.

This lets you learn which topics Google responds to before investing heavily.

A Practical Affiliate Keyword Research Process

Here is the workflow I would use from scratch.

Step 1: Choose Your Niche

Do not start keyword research without understanding your market.

Define:

• subject
• audience
• problems
• products
• constraints

Step 2: List Your Main Product Categories

Write down every major category people buy.

These become seed terms.

Step 3: List Audience Problems

What causes someone to search before buying?

Write those problems down too.

Step 4: Expand Your Seed Terms

Use keyword tools, Google suggestions, competing websites, communities, and search results.

Collect:

• best keywords
• comparisons
• alternatives
• problems
• questions
• brands
• use cases
• constraints

Step 5: Inspect the SERPs

Do not skip this.

Look at what actually ranks.

Identify weak or poorly matched results.

Step 6: Group Keywords by Intent

Combine variations that should use the same page.

Separate keywords where the user expects a different answer.

Step 7: Create Topic Clusters

Group articles around broader topics.

Step 8: Identify the Commercial Page

Every major cluster should usually have a commercially useful destination.

Step 9: Build Supporting Content

Create informational and comparison pages around that commercial topic.

Step 10: Prioritize Opportunities

Consider:

• intent
• SERP weakness
• relevance
• monetization
• your ability to make the result better

Then publish. Our guide to building a niche affiliate site covers how to turn that plan into a site.

Example Keyword Map

Suppose your niche is compact home gyms.

Your first cluster could be:

Low-Ceiling Home Gyms

Primary commercial page:

Best Squat Racks for Low Ceilings

Supporting comparison:

Squat Stand vs Power Rack for Low Ceilings

Informational:

How Tall Should a Ceiling Be for a Squat Rack?

Informational:

How Much Clearance Do You Need Above a Squat Rack?

Commercial:

Best Short Power Racks

Informational:

How to Build a Home Gym in a Low-Ceiling Basement

That is a much stronger strategy than randomly publishing:

Best Dumbbells

Best Treadmill

Best Bench

Best Protein Powder

Best Exercise Bike

Focus creates authority.

What I Would Look for in 2026

If I were researching affiliate keywords for a new site today, I would pay especially close attention to searches where:

• Reddit and forums occupy multiple positions
• generic publishers rank instead of specialists
• search intent is poorly served
• the user has a specific constraint
• products require significant research before purchasing
• current articles are outdated
• results lack original comparisons or data
• there are clear buyer questions nobody answers particularly well

Those situations give focused publishers room to compete.

Affiliate Keyword Research Checklist

Before creating a page, ask:

• Is this search relevant to my niche?
• What does the searcher actually want?
• Is the intent commercial, informational, or somewhere between?
• Does this keyword belong on an existing page?
• Are current results genuinely good?
• Is there an underserved angle?
• Can I make my page meaningfully better?
• Does this topic support the rest of my site?
• Is there a natural monetization opportunity?
• Can I add original information?
• Are there related questions worth covering?
• Where will this page internally link?
• What will link back to it?

If you cannot answer those questions, don’t publish yet.

Research a little more.

The Goal Isn’t More Keywords

Keyword research is not about producing the biggest spreadsheet.

It’s about identifying the best opportunities.

You could build a profitable website from 100 carefully selected topics.

Or waste years publishing 2,000 pages nobody needs.

The difference is understanding:

the audience

the problem

the intent

the competition

the economics

and your reason to exist in the search results.

Find markets people spend money in.

Find questions people genuinely need answered.

Find search results that can be improved.

Then create something worth finding.

That is affiliate keyword research.

And once you have your keywords, the next job is turning them into a website structure that helps users — and search engines — understand exactly what your site is about. For the broader audience-first approach, read Affiliate Niche Sites in 2026.