Latent Semantic Indexing refers to the technique by means of which relationship between the terms and concepts contained in a text is identified and established.

Principle:- LSI assumes that words have similar meanings if they are used in the same context or background.

Benefits of LSI:-

• Overcomes the Synonymy and Polysemy
• Undertakes categorization of documents
• Is independent of language
• Can effectively work upon unstructured content

LSI & SEO:-Search engines have now started using LSI algorithm to index the websites in order to how relevant results to the users. This has had a direct effect on Search Engine Optimization which has to put more emphasis on relevance of the content rather than stuffing the content with keywords. It gives more importance to related keywords than primary ones.

LSI has proved to be of advantage to the search engines as it allows them to display results that match with the queries of the users. It also helps them control spam and thus provide meaningful and useful content to the searchers.

It also assist the optimizers find the right keywords which will drive traffic to their sites.

Thus LSI has come out to be an efficient tool for both Search engines as well as the webmasters.
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