What we measured ·
What Google shows for "what is an lsi keyword" right now
Method: Live Google results (United States, desktop, English) for "what is an lsi keyword" retrieved through DataForSEO's SERP API on 2026-10-22. Page types are our own classification of each ranking URL.
The top 9 organic results for "what is an lsi keyword" were 5 guides or explainers, 2 product or service pages, 1 forum or community thread, 1 free tool. The first three were www.infidigit.com, www.wildcreekstudio.com, www.twinword.com. Community threads (www.quora.com) ranked on page one, a sign searchers want first-hand answers, not only vendor pages.
Google showed an AI Overview for this query, citing 8 source domains including www.semrush.com, www.youtube.com, www.reddit.com, www.amicited.com. Pages that state the answer directly and early are the ones an Overview can quote.
People Also Ask listed: "What are LSI keywords in SEO?"; "What are the four types of keywords for SEO?"; "What is an LSI assessment?"; "What is latent semantic indexing?". The sections below answer the ones within this page's scope.
| Position | Domain | Page type |
|---|---|---|
| 1 | www.infidigit.com | Guide or explainer |
| 2 | www.wildcreekstudio.com | Product or service page |
| 3 | www.twinword.com | Guide or explainer |
| 4 | www.inherent.com | Product or service page |
| 5 | www.webceo.com | Guide or explainer |
| 6 | www.quora.com | Forum or community thread |
What latent semantic indexing actually is
Latent semantic indexing, also called latent semantic analysis, is a mathematical technique from the late 1980s that finds relationships between terms and documents by decomposing a term-document matrix. It was designed for small, static document collections. Modern search engines use far more advanced language understanding, including neural models, and there is no evidence that Google uses LSI in ranking.
What Google has said
Google's John Mueller has said publicly that there is no such thing as LSI keywords, in the sense SEO tools use the term. Google's ranking documentation describes understanding meaning and intent, synonyms, and topics, not a list of related keywords to include.
The useful idea underneath
Translate 'LSI keyword' advice into what actually helps.
| LSI advice | What actually helps |
|---|---|
| Add a list of related keywords | Cover the subtopics a complete answer needs |
| Use synonyms a set number of times | Write naturally; search understands synonyms |
| Insert terms from an LSI tool | Answer the questions in People Also Ask and Search Console |
| Match competitors' word lists | Add what competitors lack: evidence, examples, clarity |
Related terms are still worth checking
Reviewing the terms and entities that ranking pages mention is a reasonable way to spot gaps in your coverage. If every top page explains crawl budget when discussing robots.txt and yours does not, you may be missing a subtopic. The goal is completeness for the reader, not inserting words. Secondary keywords that share your page's intent belong in the page; separate intents belong on separate pages.
In AI search
Language models represent meaning with embeddings, not keyword lists, so inserting related words does little. Clear, self-contained answers to the sub-questions behind a topic are what get retrieved and quoted. Our secondary keywords entry explains how to choose the related terms a page should cover. SerionFlow is the wrong tool if you want a list of 'LSI' terms to insert; it does not produce keyword-insertion lists.
Clear answers
Frequently asked questions
Are LSI keywords a ranking factor?
+
No. Google has said it does not use latent semantic indexing, and 'LSI keywords' are not a ranking concept. Covering related subtopics naturally still helps relevance.
What is latent semantic indexing?
+
An information retrieval technique from the late 1980s that uses matrix decomposition to find relationships between words and documents.
About the author
Shadrack Kumi · Founder, SerionFlow
Shadrack builds SerionFlow's site research, page generation, and Search Console tooling, and runs the free tools these guides pair with. Search Console figures cited on these pages come from serionflow.com's own property.
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