LSI keywords (also known as semantic keywords) are the related keywords to the main keyword. Many of the search engines like Google use it to decide the link between different entities of the web content." It helps Google get the meaning of the written content. LSI makes a lot of sense too. For example – Search engine discovers a page with the word “Apple” on it, how does it differentiate whether the Apple is a fruit, Apple is a brand or Apple is name of any pet? It uses Latent semantic indexing keywords, if there are words like fruit, taste, flavor in the article then it would be easy for search engine.