What Is Keyword Research?
Keyword research is how you discover what people search for and how they phrase it. A keyword is any word or phrase someone types or speaks into a search engine. It might be one word, such as “budget,” or a full question, such as “how do I make a monthly budget?”
Research turns guesses into evidence. Instead of assuming how customers describe a problem, you look at the words they actually use. Google’s SEO Starter Guide makes a similar point: think about the words a user might search for to find a piece of your content.1
It is a core part of search engine optimization. Our explainer on SEO covers the bigger picture. Keyword research is the step that tells you which topics to cover and what to call them.
It also helps beyond search. The same research shows you what your audience cares about, which questions keep coming up and which words they use for your products. That shapes product pages, ads, emails and even how you describe your business.
Why Keyword Research Matters
Good research means you create content people are already looking for, instead of hoping they find it. Search traffic tends to arrive steadily for months or years once a page ranks well.
- You match real demand. A page about a topic nobody searches for will get little search traffic, however good it is.
- You speak your audience’s language. Customers might say “cheap flights” while the industry says “low-cost fares.” Research tells you which to use.
- You find gaps. You spot questions competitors have not answered well, which can be easier to rank for.
- You plan with focus. A keyword list becomes a content calendar, so each new page has a clear purpose.
- You attract the right visitors. Choosing terms with buying intent brings people more likely to sign up or purchase.
The Key Metrics Explained
Most keyword tools show the same few numbers, and each answers a different question.
| Metric | What it tells you | How to use it |
|---|---|---|
| Search volume | Roughly how many searches a term gets per month | Shows demand, but it is an estimate, not an exact count |
| Keyword difficulty | A tool’s estimate of how hard it is to rank on page one | New sites usually start with lower-difficulty terms |
| Search intent | What the searcher wants to do or find | Decides what kind of page you should create |
| Cost per click (CPC) | What advertisers pay for a click on that term | A higher CPC often signals commercial value |
| Trend | Whether interest is growing, falling or seasonal | Helps you time content and avoid fading topics |
Treat every number as a guide. Google’s Keyword Planner itself shows average monthly searches as ranges for many accounts, and its forecasts are estimates.2 Third-party tools build their own estimates, so their figures often differ from each other.
Difficulty scores are tool-specific. A score of 30 in one tool does not mean the same as 30 in another. Use them to compare terms within one tool, not as an absolute measure.
Search Intent: The Most Important Factor
Search intent is the reason behind a search, and matching it matters more than any other keyword metric. Two terms with the same volume can need completely different pages.
- Informational: the searcher wants to learn, such as “what is a 401k.” Guides and explainers fit best.
- Navigational: they want a specific site, such as “Gmail login.”
- Commercial: they are comparing options, such as “best budgeting apps.” Reviews and comparisons fit best.
- Transactional: they are ready to act, such as “buy running shoes size 10.” Product or sign-up pages fit best.
The quickest way to check intent is to search the term yourself. Look at what already ranks. If the top results are all how-to guides, a product page is unlikely to rank there. Our full explainer on search intent goes deeper.
Short-Tail vs Long-Tail Keywords
Short-tail keywords are broad and popular; long-tail keywords are longer, more specific and usually easier to win.
| Type | Example | Volume | Competition | Intent |
|---|---|---|---|---|
| Short-tail | “running shoes” | High | Very high | Unclear: learn, compare or buy? |
| Mid-tail | “women’s trail running shoes” | Medium | High | Clearer, often commercial |
| Long-tail | “best trail running shoes for wide feet” | Low | Lower | Very clear, close to buying |
Each long-tail term brings fewer visitors, but there are far more of them, and they add up. Many searches are long and specific, especially as people ask full questions by voice or to AI-powered search features.
New websites usually do best by starting with long-tail terms. Big, broad terms are dominated by large, established sites with many links. Our explainer on backlinks explains why links matter so much for those competitive terms.
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Get the Newsletter →How to Do Keyword Research: Step by Step
A simple, repeatable process works better than chasing every keyword a tool suggests.
- List seed topics. Write down the main subjects your business or site covers. A budgeting app might start with “budgeting,” “saving money” and “debt.”
- Expand the list. Put each seed into a keyword tool. Also type it into Google and note the autocomplete suggestions, the “People also ask” questions and the related searches at the bottom of the page.
- Check your own data. If your site already has some traffic, Google Search Console shows the real queries people used to find you.3 These are often the best clues of all.
- Group similar terms. “How to budget,” “how to make a budget” and “budgeting for beginners” usually belong on one page, not three.
- Check intent for each group. Search the main term and look at what ranks. Decide what type of page would satisfy that searcher.
- Weigh value against difficulty. Prefer terms that are relevant, have real demand and look winnable for a site of your size.
- Map one main keyword to one page. Give each page a clear primary topic. This avoids your own pages competing with each other.
- Prioritize. Start with terms that are both easier and closer to what you sell or offer, then build out from there.
Free and Paid Keyword Research Tools
You can start with free tools, and add paid ones once you need deeper competitor data.
- Google Keyword Planner: free inside a Google Ads account. It suggests related terms and shows estimated monthly searches and bid ranges.2
- Google Search Console: free. It shows the queries that already bring impressions and clicks to your site.3
- Google Search itself: autocomplete, “People also ask” and related searches are a free window into real questions.
- Google Trends: free. It shows whether interest in a topic is rising, falling or seasonal.
- Paid SEO suites: tools such as Semrush, Ahrefs and Moz add difficulty scores, competitor keywords and larger databases.
Paid tools save time but are not essential at the start. Many successful sites began with free tools, a spreadsheet and a lot of manual searching.
Using Keywords on the Page
Once you have chosen a keyword, use it naturally where it helps readers and search engines understand the page. Google is clear that stuffing keywords, repeating them unnaturally, goes against its spam policies.5
- Title tag: include the main term near the start, written so a person would want to click.
- Main heading (H1): make it clear what the page is about.
- Opening paragraph: answer the question early, using the natural phrase.
- Subheadings: use related terms and questions where they fit the structure.
- URL: short, readable and descriptive, such as /what-is-a-budget/.
- Meta description: a short summary that may appear in search results and encourage clicks.
Beyond placement, the depth of the answer matters most. Google’s helpful-content guidance favors pages that offer original insight and answer the question fully.4 A page that truly answers the question tends to cover related terms naturally.
Keyword Clusters and Topic Authority
A keyword cluster is a group of related terms covered by a main page and several supporting pages that link to each other. It helps search engines see that your site covers a topic in depth.
Here is how a cluster might look for a site about personal finance. A main guide covers “how to budget.” Supporting pages cover “50/30/20 rule,” “zero-based budgeting,” “budgeting apps” and “how to save for an emergency fund.” The supporting pages all point back to the budgeting guide, which in turn links to every one of them.
This structure also helps readers. Someone who lands on one page can easily find the next useful one. Our explainer on content marketing covers how clusters fit into a wider content plan.
Keyword Research in the Age of AI Search
AI features in search change how answers appear, but people still type and speak queries, so understanding their words still matters.
Searches are getting longer and more conversational. People ask full questions and add follow-up details. That makes long-tail and question-based research even more useful.
AI summaries can answer simple questions directly on the results page. That may reduce clicks for basic definitions. Pages that offer depth, original examples, tools or clear comparisons give people a reason to click through. Our explainer on Google AI Overviews covers what this means for websites.
A Worked Example
Here is a made-up example of keyword research for a small bakery in Denver.
The owner starts with seed topics: “birthday cakes,” “sourdough bread” and “gluten-free baking.” Expanding “birthday cakes” in a tool brings up terms like “custom birthday cakes Denver,” “birthday cake delivery Denver” and “how far in advance to order a birthday cake.”
Searching each term shows different intent. The first two return local bakeries and maps, so they need a strong service page and a Google Business Profile. The third returns blog posts, so a helpful guide fits. Our explainer on local SEO covers the map side.
The owner maps “custom birthday cakes Denver” to the main cakes page and writes a short guide answering the ordering question. The guide links to the cakes page. Within a few months, both pages begin to collect impressions in Search Console, revealing new questions to answer next.
How to Measure Whether Your Keywords Work
Research is only useful if you check the results, so track a few simple numbers after you publish. Rankings take time, often several weeks or months for a new site.
- Impressions: how often your page appears in search results. Rising impressions show Google is testing the page for more queries.
- Clicks and click-through rate: how many people chose your result. A low rate can mean your title or description needs work.
- Average position: where you usually appear. Moving from page two to page one often brings a big jump in clicks.
- New queries: the extra terms your page starts to appear for. These often point to sections worth adding.
- Conversions: sign-ups, sales or leads from search visitors. Our explainer on conversion rate covers how to measure them.
Search Console shows the first four for free.3 Review them monthly. Update pages that get impressions but few clicks, and expand pages that rank for questions they only half answer.
Common Keyword Research Mistakes
A few mistakes waste the most time and effort.
- Chasing volume only, and picking huge terms a new site cannot realistically rank for.
- Ignoring intent, and writing a blog post for a term where Google shows only product pages.
- Targeting irrelevant terms that bring visitors who will never become customers or readers.
- Creating many near-identical pages for small variations of the same keyword.
- Stuffing keywords into text, which makes it worse to read and can break Google’s spam policies.5
- Never revisiting the list. Search behavior changes, so review your keywords every few months.
Key Terms Explained
- Seed keyword: a broad starting term you expand into a longer list.
- Long-tail keyword: a longer, more specific phrase with lower volume and usually clearer intent.
- SERP: the search engine results page, everything shown after you search.
- Keyword cannibalization: when several of your own pages target the same term and compete with each other.
- Impressions: how often your page appeared in search results, shown in Search Console.
The Bottom Line
Keyword research tells you what people want and how they ask for it, so you can build pages that meet them there. Start with your core topics, expand with free tools, check intent by searching yourself, and favor relevant, winnable long-tail terms. Then write genuinely helpful pages and use the words naturally. For more, browse our SEO explainers.
Deciding between free and paid search traffic? Our comparison of SEO vs SEM explains when each works best, and our guide on writing meta descriptions helps your pages win the click.
Frequently Asked Questions
It is finding the words and phrases people type into search engines about your topic. You then use that knowledge to create pages that match what they are looking for.
Use Google Keyword Planner, Google Search Console, Google Trends and the suggestions Google shows as you type. Searching terms yourself also shows what kind of page already ranks.
It is a longer, more specific search phrase, such as a question about trail running shoes for wide feet. Each one has fewer searches but usually less competition and clearer intent.
Give each page one main keyword and a handful of closely related terms. Covering the topic well usually brings in many related searches naturally.
Yes. People still use words to search, and their questions are getting longer and more specific. Understanding those questions helps you create content worth clicking.
Do it before creating any new page, and review your main list every few months. Search Console data will keep showing new queries worth covering.
Sources
- 1Google Search Central: SEO Starter Guide
- 2Google Ads Help: About Keyword Planner
- 3Google Search Console Help: Performance Report (Search Results)
- 4Google Search Central: Creating Helpful, Reliable, People-First Content
- 5Google Search Central: Spam Policies for Google Web Search
Every figure in this article is checked against the sources above. How we research and fact-check →
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