How Google Uses Latent Semantic Indexing

December 25th, 2008 | by admin |

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Most people have used the internet at some point or the other, but even those who have not, have some idea of what Google is. But if you were to ask the average person, they do not know what Google does. That's where Latent Semantic Indexing comes into play and why Google searches are as accurate as they are.

Latent Semantic Indexing gives a search engine the ability to determine what a page is about by searching for one or more keywords that have been selected by the user. LSI not only records keywords within a document, but it also looks at the document collection in it's entirety.

LSI has a net effect on making the value of web pages lower by placing importanct on related words or phrases, thus only allowing matches for specific terms.

This will occur even when certain pages are not focused on the target theme. Contrary to what you would think, pages that are too focused on one phrase have a tendency to rank worse in a search. But those pages that focus on a wider range of related keywords tend to have more stable rankings.

Semantic Web – Latent Semantic Indexing