LSI Keywords

LSI (Latent Semantic Indexing) keywords are terms and phrases that are thematically related to a primary keyword. The term is somewhat of an SEO misnomer — Google does not use LSI in a technical sense — but the underlying concept is valid: search engines use co-occurring words and phrases to understand the context and depth of content. Including semantically related terms helps establish topical coverage.

For example, a page targeting "espresso machine" might naturally include terms like "brew time," "portafilter," "crema," and "barista." These aren't just synonyms; they are terms that an authoritative piece on the subject would naturally contain. Modern content optimization tools identify these terms by analyzing top-ranking competitor pages to surface the language patterns Google associates with the topic.