LSI Keywords
LSI keywords are terms related to a main topic that help search engines understand context, but Google has said it does not use LSI as a ranking factor.
Key takeaways
- LSI keywords are related terms that help search engines understand context.
- Google does not use LSI as a ranking factor — focus on topical completeness.
- Use natural language and cover subtopics instead of forcing specific phrases.
- Find related terms via Google autocomplete, related searches, and People Also Ask.
- Avoid keyword stuffing and writing for search engines over people.
The term is often used loosely in SEO, but the practical goal is to build topical relevance.
Example
- Main keyword: "apple"
- Related terms (often called LSI keywords): fruit, orchard, pie, nutrition, Granny Smith, Fuji
- Why it works: These terms help Google understand the page is about the fruit, not the tech company.
- Real use: A recipe page for apple pie naturally includes "baking," "cinnamon," "sugar," "crust" — these are related terms, not forced keywords.
When should I use this?
- When writing a new blog post or article to cover a topic thoroughly.
- When optimizing an existing page that lacks depth or has thin content.
- When you want to avoid keyword stuffing and write naturally.
- When building a topic cluster or pillar page strategy.
What it is not
- Not a ranking factor: Google has stated it does not use LSI keywords as a ranking signal.
- Not exact synonyms: Related terms are contextually connected, not interchangeable words.
- Not a list to force into every paragraph: Overuse can look like keyword stuffing.
- Not a magic bullet: Topical relevance comes from comprehensive coverage, not a specific set of terms.
Quick start
- Identify your main topic and its core keyword.
- Brainstorm related subtopics and common questions users ask.
- Use Google autocomplete and "People Also Ask" for real search queries.
- Check related searches at the bottom of SERPs for more ideas.
- Incorporate terms naturally in headings, body text, and supporting sections.
Common mistakes
- Treating LSI keywords as exact synonyms instead of related concepts.
- Forcing the phrase "LSI keywords" into the copy as if it were a required ranking signal.
- Using unrelated words just because a tool labels them as semantically connected.
- Ignoring search intent and topic coverage while focusing only on term variation.
Next step
FAQ
What are LSI keywords?
LSI keywords are terms related to a main topic that help search engines understand context. The term comes from Latent Semantic Indexing, but Google does not officially use LSI as a ranking factor.
Are LSI keywords important for SEO?
The concept of using related terms is important for building topical relevance, but the specific label 'LSI keywords' is outdated. Focus on covering a topic comprehensively with natural language.
How do I find LSI keywords?
Use Google autocomplete, related searches at the bottom of SERPs, People Also Ask boxes, and keyword research tools like Semrush or Ahrefs.
Related topics
Sources
- Google Search Central — Best source for Google's guidance on how Search understands content, relevance, and helpful page creation.
- Google Search Central - Creating helpful, reliable, people-first content — Useful for explaining topical coverage and natural language use instead of keyword-stuffing tactics.
- Google Search Central - SEO Starter Guide — Provides official basics on writing titles, headings, and content that clearly describe page topics.
- Semrush — Widely cited SEO reference explaining why the term is commonly used but conceptually misleading.
Reviewed by Lucía Marín, Founding editor.