LSI Keywords (Latent Semantic Indexing Keywords)

'LSI keywords' is a legacy SEO term often used to describe semantically related phrases, even though modern search engines do not optimize using classic latent semantic indexing in the way the term implies. In current practice, the useful idea is topical context: include relevant concepts, entities, and supporting vocabulary that help users and search systems understand page intent. This is not about injecting synonym lists or repeating variants unnaturally. Strong semantic coverage comes from answering adjacent questions, structuring information clearly, and using language that reflects real user intent. Think of this term as shorthand for contextual relevance, not as a technical ranking mechanism you can directly tune.