Editor’s note: This article has been updated to reflect developments in Google Search and SEO best practices. Latent Semantic Indexing (LSI) has long been cause for debate amongst search marketers. If you Google the term ‘latent semantic indexing ranking factor,’ you will encounter both advocates and skeptics. However, as of 2025, there is a clearer … Continue reading What is Latent Semantic Indexing and how does it work?