Keyword research is finding the words and questions your customers use when they search, then choosing which ones each page should target. To do keyword research for SEO in 2026: list seed topics from your services, expand them with tools, classify each keyword by search intent, check search volume and keyword difficulty, look at what already ranks, and include the conversational questions people ask AI assistants. Prioritise keywords with buying intent you can realistically win.
On this page
- What is keyword research?
- Start with search intent, not volume
- The keyword research process, step by step
- Why long-tail keywords win for most businesses
- How to read search volume and keyword difficulty
- Keyword research for AI search
- Keyword research tools: free and paid
- Common keyword research mistakes
- Doing it yourself vs keyword research services
- Keyword research by business type
- Competitor keyword research and keyword gap analysis
- Keyword clustering and keyword intent
- Keyword research tips for beginners
- Frequently asked questions
Keyword research has not disappeared in the age of AI search — it has widened. People still type short searches into Google, but they also ask long, specific questions in ChatGPT, Perplexity and Google’s AI Mode. Good SEO keyword research now covers both, and puts intent ahead of raw volume. Here is how to do keyword research for SEO, step by step.
What is keyword research?
Keyword research is the process of discovering the searches that matter to your business, measuring their demand and competition, and deciding which page should rank for each. A primary keyword is the main search a page targets; secondary keywords are close variants and related questions that page also answers.
Start with search intent, not volume
Every search has a purpose. Matching it matters more than any other factor.
| Intent | Example | Best page type |
|---|---|---|
| Informational | “how to do keyword research” | Guide or blog post |
| Commercial investigation | “best keyword research tools”, “seo agency reviews” | Comparison or buyer’s guide |
| Transactional | “keyword research services”, “hire seo consultant” | Service or product page |
| Local | “seo agency near me” | Location page and Google Business Profile |
| Navigational | A brand name | Homepage |
The fastest way to confirm intent is to search the keyword and look at what ranks. If the top results are all guides, a service page will struggle, and vice versa.
The keyword research process, step by step
- List seed topics. Write down your services, products, customer problems and the words customers use on calls and in emails.
- Expand with tools. Put each seed into a keyword tool to find variations, questions and long-tail keywords.
- Mine real questions. Look at Google’s “People also ask”, autocomplete, forums, reviews and your own Search Console queries.
- Classify intent. Label each keyword informational, commercial, transactional or local.
- Check volume and difficulty. Note monthly search volume and keyword difficulty, but treat both as estimates.
- Study the results page. Note who ranks, which SERP features appear and whether an AI Overview answers the question.
- Group into topics. Cluster keywords that one page can answer together.
- Prioritise. Score each group on business value, intent and how winnable it is.
- Map to pages. Assign every group to one existing or planned page. See our keyword mapping guide.
Why long-tail keywords win for most businesses
Long-tail keywords are longer, more specific searches such as “emergency plumber open sunday in dallas”. Each has small volume, but together they make up most searches, they convert better and they are far easier to rank for than broad short-tail keywords like “plumber”. A new or small site should build its first wins on long-tail, high-intent terms.
How to read search volume and keyword difficulty
- Search volume is an estimated monthly average. Google Keyword Planner shows ranges unless you run ads; third-party tools model their own numbers, so they disagree.
- Keyword difficulty scores estimate how hard it is to reach page one, mostly from competitors’ links. Use them to compare keywords, not as absolute truth.
- Trend matters: check whether interest is rising, seasonal or falling in Google Trends.
- Clicks are not volume. If an AI Overview or featured snippet fully answers a query, fewer searchers click. Weigh this when choosing informational targets.
Keyword research for AI search
AI keyword research means researching prompts as well as keywords. People ask assistants long, conversational questions with context: “which SEO agency is best for a dental clinic in Sydney with a small budget?” To research these:
- Ask ChatGPT, Perplexity, Gemini and Google AI Mode the questions your buyers ask, and note which sources they cite.
- Collect the follow-up questions the assistants suggest.
- Write pages that answer the full question clearly and early, with specifics AI tools can quote.
Our AEO guide covers how to get cited in those answers.
Keyword research tools: free and paid
| Tool | Best for | Cost |
|---|---|---|
| Google Search Console | Keywords you already appear for | Free |
| Google Keyword Planner | Volume ranges and commercial ideas | Free with an Ads account |
| Google Trends | Seasonality and rising topics | Free |
| AnswerThePublic, AlsoAsked | Question research | Free tiers |
| Semrush, Ahrefs, SE Ranking | Difficulty, competitor gaps, at scale | Paid |
See our best SEO tools guide for a fuller comparison of keyword research tools, including the best free keyword research tool options.
Our consultants build keyword maps tied to revenue, not just volume.
Common keyword research mistakes
- Chasing high-volume keywords you cannot rank for yet.
- Ignoring intent, so a blog post targets a buying keyword or a service page targets a question.
- Targeting the same keyword with several pages (keyword cannibalisation).
- Trusting one tool’s numbers as fact.
- Never revisiting the research as the market and AI search change.
Doing it yourself vs keyword research services
For a small site, this process done carefully over a few days is enough. Larger or more competitive businesses often hire keyword research services — a consultant or keyword research agency — because the value is in the judgement: which terms are commercially worth it, which are winnable, and how they map to the site. Good SEO keyword research services deliver a prioritised keyword map, not a spreadsheet of 5,000 terms.
Keyword research by business type
- Local keyword research: combine services with towns, neighbourhoods and “near me”. Check which searches show a map pack — those need Google Business Profile work as well as pages.
- Keyword research for ecommerce: research category and product terms, modifiers such as “cheap”, “best”, sizes and colours, and comparison searches.
- Keyword research for blog posts: focus on question keywords (“how”, “why”, “what”) that lead naturally to your services.
- B2B: research problems, job-title language and integration or alternative searches.
Competitor keyword research and keyword gap analysis
Competitor keyword research shows which searches bring traffic to your rivals. A keyword gap analysis compares your rankings with theirs to find terms they win and you do not. Tools such as Semrush keyword research (Keyword Gap) and Ahrefs keyword research (Content Gap) do this automatically; Google Trends keyword research then tells you which of those topics are growing.
Keyword clustering and keyword intent
Keyword clustering groups keywords that one page can rank for together, usually because Google shows the same results for them. Label every cluster with its keyword intent and prioritise buyer intent keywords — “hire”, “cost”, “near me”, “best”, “services” — before purely informational ones. For a new site, low competition keywords with clear intent are the fastest path to first rankings.
Keyword research tips for beginners
- Start with your customers’ language, not industry jargon.
- Use a simple keyword research template: keyword, intent, volume, difficulty, target page, priority.
- Try keyword research with ChatGPT to brainstorm questions and variations, then check real volumes in a keyword tool — AI tools do not have search data.
- Revisit your research every few months.
These keyword research tips make keyword research for beginners manageable without paid tools.
Keyword research: frequently asked questions
How do I do keyword research for SEO?
List seed topics, expand them with keyword tools, classify search intent, check volume and difficulty, study the ranking pages, group keywords into topics, prioritise by business value and map each group to one page.
Is keyword research still important in 2026?
Yes. It has broadened to include conversational questions asked in AI assistants, and intent now matters more than volume, but understanding how customers search is still the foundation of SEO.
What is the best free keyword research tool?
Google Search Console shows the keywords you already appear for, Google Keyword Planner gives volume ranges, and Google Trends shows seasonality. Together they cover most small-business needs.
How many keywords should one page target?
One primary keyword plus a handful of close variants and related questions that the same page can answer well. Different intents need different pages.
What are long-tail keywords?
Longer, more specific searches with lower volume but clearer intent. They are easier to rank for and usually convert better than broad keywords.
What is the best keyword research tool?
There is no single best keyword research tool. Google Search Console and Keyword Planner are the best free starting points; Semrush and Ahrefs are the most complete paid options for competitor and gap analysis.
How much does keyword research cost?
Keyword research cost ranges from free (doing it yourself) to a few hundred or a few thousand dollars when done by a consultant, depending on the number of services, markets and languages.
When should I hire a keyword research consultant?
Hire a keyword research consultant when you are entering a competitive market, rebuilding your site or targeting several countries, where mistakes in targeting are expensive.
Can I use ChatGPT for keyword research?
Yes, for brainstorming topics and questions, but verify volumes and competition in a keyword tool because AI assistants do not have live search data.
What are low competition keywords?
Keywords where the current top results are weak — small sites, thin content or poor intent match — so a well-built page can rank relatively quickly.