whitenight - 5:59 pm on Oct 8, 2007 (gmt 0)

Vertical search is important because it's one of the two major things I've long talked about as being how search will advance. First generation search analyzed words on a page to rank content. Second generation search tapped into link analysis. Third generation search to me is looking at both user input (what we visit; what we click on; personalized results) and making search go more vertical.

Google 2.0 - Google Universal Search [searchengineland.com]
(for your reading pleasure)
Funny that title of the page, no?

More educational reading for those who like to be informed.
[en.wikipedia.org...]