How do search engines find relevant content?

Question

How does Google find relevant content when it\'s parsing the web?

Let\'s say, for instance, Google uses the PHP native DOM Library to parse content. What methods would t

Answer 1

To answer one of your questions, I am reading the following book right now, and I recommend it: Google's PageRank and Beyond, by Amy Langville and Carl Meyer.

Mildly mathematical. Uses some linear algebra in a graph theoretic context, eigenanalysis, Markov models, etc. I enjoyed the parts that talk about iterative methods for solving linear equations. I had no idea Google employed these iterative methods.

Short book, just 200 pages. Contains "asides" that diverge from the main flow of the text, plus historical perspective. Also points to other recent ranking systems.