What searching algorithm/concept is used in Google?

Question

What searching algorithm/concept is used in Google?

Answer 1

This question cannot be answered canonically. The Algorithms used by Google (and other search engines) are their closest guarded secrets and change constantly. Every correct answer can be invalid a month or a year later.

_{(I know this doesn't really answer the question, but that's the point, there is no possible answer.)}

Answer 2

PageRank is a link analysis algorithm used by Google for the search engine, but the patent was assigned to Stanford University.