What are secondary keywords in SEO?

The terms describe a keyword's role, not its length.

Search the primary keyword and note related searches and People Also Ask questions. Look at the keywords the top-ranking pages also rank for in a keyword tool. After publishing, check the page's queries in Search Console; it often ranks for related terms you did not plan, which are your best secondary keywords. Keyword clustering tools group terms that share ranking pages, which identifies secondary keywords automatically.

If the related term's search results are mostly the same pages as the primary keyword's, it is a secondary keyword for the same page. If its results are different, it is a separate intent and needs its own page. On this site we treated keywords as one intent when their top-ten results shared four or more URLs, and planned separate pages otherwise.

Use secondary keywords where they fit naturally: in an H2 that answers a related question, in a table column, in an example, or in the body where the topic comes up. You do not need to repeat each a set number of times; modern search understands synonyms. A page that covers the subtopics behind secondary keywords will naturally use them.

AI search breaks queries into sub-questions, sometimes called query fan-out. Covering the subtopics behind your secondary keywords in self-contained sections gives AI systems more passages to retrieve for those sub-questions. Our query fan-out explorer shows the kinds of sub-questions a broad query tends to produce. SerionFlow is the wrong tool for adding secondary keywords to pages you already have; it covers them when writing new pages.