LSI stands for Latent Semantic Indexing. It is a part of the Google’s algorithm which enables the search engine to understand the content of a page and the intent of the search queries. It identifies related words in content to better classify web pages and thus to deliver more relevant and accurate search results. It can understand synonyms and the relationship between words and thus can interpret web pages more deeply to provide relevant information to users. For example, if someone searches with a keyword “CAR,” it will show related things such as car models, car auctions, car race, car companies and more.