gpilling - 7:11 am on May 7, 2010 (gmt 0)
A search engine needs to figure out two main things:
- What is this page about?
- Is it a good page about its topic?
Relevant links out could definitely help with the first question, and possibly with the second as well.
I think you should add - "it has to decide which of the thousand relevant pages it should serve first." since we all know there are many, many relevant pages for almost any subject on the internet. So if you were a smart search engine, what would you look at besides the links?