Keyword Research for SEO: Using Related Keywords

Keyword research is the step where you decide what an article is about before you write it. A list of terms alone does not do that. The useful version of keyword research for SEO collects related keywords, sorts them by what the searcher wants, groups them into topics, and uses the groups to plan articles and to fix old posts.

Keyword research steps: collect related keywords and related searches

Related keywords are terms connected to your seed term, and collecting them is the first of the keyword research steps. The seed is the one phrase you start from, such as the subject of the article you plan to write.

Pick a seed made of two words rather than one. A single broad word tends to return generic terms.

A two-word phrase tends to return more specific ones, and specific terms are the ones you can write a page about. Then look in three places:

• The suggestions Google shows while you type the seed.
• The related searches Google lists on the results page.
• A keyword tool that returns many related terms at once.

Write every term into one list without judging it yet. Judging comes in the next steps.

Keyword research tools for SEO: free picks and a related keywords tool

Keyword research tools for SEO fall into three jobs: producing terms, showing volume and trend, and showing what your own site already gets. Choosing a tool is easier once you know which job you need done.

Ahrefs suggests trying free keyword tools, and the Google ones in the table are free to use. Suites such as Semrush and Ahrefs report more metrics, for example keyword difficulty and cost per click, but the method below does not change. If you want a quick list for a seed term, the related keywords tool on sakuttoAI lists related keywords for it.

Search intent: sort related searches by what the reader wants

Search intent is what the searcher wants to learn or do, and sorting your list by it keeps you from writing a page that answers the wrong question. Read each term and ask what the person typing it expects to see. A simple sort uses four kinds of intent:

• Learn something: "related keywords meaning".
• Learn how to do something: "how to do keyword research".
• Reach a particular site: "Google Keyword Planner".
• Buy something: "keyword research tools pricing".

This is a sort for your own list, not an official standard, and Moz's beginner's guide has a section on four main types of search intent. For a blog, the first two groups are usually the ones to target. Terms in the buying group usually need a product or comparison page rather than a guide.

Intent also tells you the format. A term that asks "how to" needs steps, and a term that asks "what is" needs a short definition first.

Keyword research by search volume: long tail keywords first

To choose among the terms you have sorted, compare three things: search volume, how hard the term is to rank for, and what a visitor is worth to your business. Volume alone is a poor guide, because the highest-volume terms draw the strongest competitors.

Long tail keywords are longer, more specific phrases. They usually have lower volume and less competition, and SEO.com and Moz both give them their own section. For a newer site, they are usually the more realistic place to start.

Volume figures also disagree between tools, so treat them as a rough size, not an exact count. Use the same tool for every term you compare so the numbers are at least consistent with one another. Pick the terms where all three checks agree: enough volume to matter, a realistic chance of ranking, and a reader who might become a customer.

Keyword clustering and keyword mapping: one topic per article

Keyword clustering groups similar keywords so that one page serves one topic, and keyword mapping records which page owns which group. Yoast's guide makes the same point: a focus keyphrase and its synonyms need only one page.

Take the seed "related keywords". Your sorted list might form three clusters:

• Finding them: related keywords tool, how to find related keywords.
• Using them for SEO: related keywords SEO, keyword research steps.
• Basics: what are related keywords, related searches.

Each cluster answers a different question, so each becomes its own article. Putting all three in one page gives every group a thin answer.

Next, build the keyword map as a table with one row per page: the page, its main keyword, and the related terms it covers. SEO.com offers a keyword map template, but a spreadsheet with those three columns is enough.

Keyword cannibalization and other keyword research process mistakes

Keyword cannibalization happens when more than one page of your site targets the same keyword, so your own pages compete against each other. The fix is the map from the previous step: one keyword, one page. Backlinko lists three other common problems in the keyword research process:

• Search volumes do not match across tools.
• High-volume keywords are too competitive.
• Keywords show volume but do not convert.

Each problem has a matching response. Compare volumes inside one tool, start with long tail keywords instead of the biggest terms, and check the intent before you commit, because a term with volume but the wrong intent brings visitors who do not convert.

Yoast's guide states the same rule from the other side. It warns against using your exact focus keyword more than once across your content, because Google has a hard time telling very similar pages apart. Related keyphrases, by contrast, help Google understand the topic, so let them appear in their own sections of the one page.

Keyword research steps for old posts: audit with related keywords

The same keyword research steps work on posts you have already published. SEO.com and Ahrefs both suggest checking which keywords you already rank for. For each old post:

1. Take its main keyword and collect the related keywords.
2. Compare the list with the post's current headings.
3. Mark the topics that no heading covers.
4. Add sections for the missing topics, and check them against the keyword map so they do not overlap another page.

Google Search Console shows the queries that already bring people to the page, which tells you which topics readers expect from it. Keep those topics when you add the new sections.

Keyword research for SEO is a sequence. Collect related keywords, use each tool for its own job, and sort the terms by search intent.

Then choose by volume, difficulty and value, cluster the terms into one topic per article, and map each topic to a page. Revisit old posts the same way. Start with the seed term for your next article.