SEO or Search engine optimization is the largely talked regarding Internet technology these days, with online business houses basking under its glory. It is a method of optimizing a website with an extensive combination of tasks that will perk up websites charisma on the different search engines. To make the job simpler, a new tool has been introduced by the SEO experts that came to be identified as LSI or latent semantic indexing. The LSI has changed the world of search engine optimization.