LSI keywords: what they are, how to collect and use them in SEO

LSI (Latent Semantic Indexing) keywords are terms and phrases that are semantically related to the main keyword query. They help search engines better understand the context of a page, which contributes to its ranking. In this article, we will examine how LSI keywords work, how to collect them, and how to use them correctly in SEO.

What Are LSI Keywords?

LSI keywords are not synonyms but words that are logically and thematically connected to the main query. For example, if the main query is “SEO optimization,” LSI keywords could be “website optimization,” “keywords,” “Google algorithms,” etc.

In the past, search engines relied on exact keyword matches, but today they use semantic analysis, which allows them to determine connections between words and assess content relevance.

Why Are LSI Keywords Important for SEO?

1. They help search engines understand page content better – Google and other search engines analyze text semantics, improving its relevance.
2. They increase search visibility – Proper use of LSI helps attract traffic from various queries.
3. They reduce the risk of over-optimization – Instead of keyword stuffing, using LSI phrases makes the text more natural.
4. They improve content quality – Using thematically related words makes the text more natural and useful for users.

How to Find LSI Keywords?

You can use the following tools:

1. Using Google Suggestions and Related Searches
   

   When entering a query, Google offers autocomplete suggestions. Additionally, at the bottom of the search results page, “Related Searches” can be found, which are potential LSI phrases.

2. Collecting Data from Google Search Console
   

   In GSC, you can review queries that bring impressions and clicks to your site and identify additional relevant words.

3. Competitor Analysis
   

   Checking competitors’ pages in SERP can help discover words that are often used together with the main query.

4. Specialized Tools
   • Rush Analytics – Analyzes content and generates a list of LSI keywords.
   • LSIGraph – Generates thematically related words.
   • Ahrefs, SEMrush, Serpstat – Help identify highly relevant queries.

How to Use LSI Keywords Correctly?

1. Headings and subheadings (H1-H3) – Including LSI phrases makes the content structured and relevant.
2. Main text – Naturally incorporating related words improves content perception.
3. Meta tags – Keywords in the title, description, and image alt tags help search engines better recognize the page’s topic.
4. Anchor text in internal links – Using semantically related terms in links improves site structure and interconnectivity.
5. URL and content structure – Using proper words in the URL helps convey the page’s content more clearly.

Conclusion on LSI Keywords

LSI keywords are a powerful tool for improving a website’s SEO optimization. By using them in texts, headings, meta tags, and links, you can boost your site’s ranking in search results, increase organic traffic, and enhance content quality. The key is to avoid over-optimizing the page and use LSI techniques naturally and wisely.