What is Latent Semantic Indexing

[yellowpage]

Now Google and Yahoo following Latent Semantic Indexing. but i am still confuse about Latent Semantic Indexing and its feature. how it is working. What is the use in search engine optimization.

[RockDavid]

Now Google and Yahoo following Latent Semantic Indexing. but i am still confuse about Latent Semantic Indexing and its feature. how it is working. What is the use in search engine optimization.

I have read on Internet (http://www.axvoice.com) that Latent semantic indexing is an algebraic model of document retrieval based on a singular value decomposition of the vectorial space of index terms.

[DennyHilary]

After being roasted by a few IR students and scientists I realized that many SEOs (like me) blended the concepts of semantically related words with latent semantic indexing, and due to constraints of the web it is highly unlikely that large scale search engines are using LSI on their main search indexes.
it is overtly obvious to anyone who studies search relevancy algorithms by watching the results and ranking pages that the following are true for Google:

* search engines such as Google do try to figure out phrase relationships when processing queries, improving the rankings of pages with related phrases even if those pages are not focused on the target term
* pages that are too focused on one phrase tend to rank worse than one would expect (sometimes even being filtered out for what some SEOs call being over-optimized)
* pages that are focused on a wider net of related keywords tend to have more stable rankings for the core keyword and rank for a wider net of keywords

Given the above, here are tips to help increase your page relevancy scores and make your rankings far more stable...

[YellowSEO]

A good example would be ranking for search engine marketing because of you are optimization for several different seo terms likes SEO, search engine ranking, search engine placement and several other key terms instead of ranking for term based of specific targeted to that specific term.