Latent Semantic Indexing (LSI) is a way for search engines to view and rank web pages in a more natural, or human, manner. The search engines use LSI algorithms to analyze pages not only for keywords, but also for synonyms and other related words which might be expected to be present. Instead of only concentrating on the general keywords on sites, latent semantic indexing looks at other words related to those keywords in order to get a better idea of what the site has to offer and helps search users find the best result.