Where can I find a guide to SEO for Yahoo?

[Ramon]

Yahoo do concentrate on backlinks but not as much as the other search engines do like Google for example. And since they've merged with Bing, they backlink checker is no longer available, therefore questioning how much emphasis is placed on their backlinks.

Inner linking is also very important to Yahoo, you should make sure that you inner pages link to each other, Yahoo favors this very much. Backlinking isn't the only thing search engines do to rate an importance of a site, Pagerank is,arguably, quite important too. Content, and unique content could also be considered important. But as the algorithms of the search engines are quite secret, there is usually some discussion on what is and what isn't important. Goodluck. Try Googling, good yahoo SEO or something like that.