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Jul 17, 2008

What are the Technologies Behind the Google Ranking?

What are the Technologies Behind the Google Ranking?

The official Google Blog had a post yesterday about the technologies that are behind the Google ranking, following up from a post about how Google ranks results. Amit Singhal is at it again and he talks about the importance of information retrieval (IR). He goes on to say that Google crawls and indexes pages to understand them and associates important concepts to a page when they're not actually obvious on the page itself.

But what about what the users are looking for? Amit says that to understand queries, Google has incorporated a "best-in-class spelling suggestion system, an advanced synonyms system, and a very strong concept analysis system." Google often can read the typos and give you better options when you misspell words. It is a little more difficult, however, to work with synonyms. Also, Google tries to derive the main concepts from a query.

Finally, Google needs to understand users. Google's motto here is that the "best locally relevant results [are] served globally." Google also utilizes personalization and universal search in this area...

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