SEO Information on the Web: Since search engines are constantly changing their algorithms much of the information on the web about SEO is going to be outdated. This guide was hopefully written generally enough to where it provides useful tips and also so that it provides accurate and useful up-to-date data. While a few of the specific techniques may change rapidly, many of the underlying ideas behind SEO stay the same for extended periods of time. For example, a few years ago many people spammed guestbooks. Now more people spam up blogs, and some have started to spam wikis. All three examples are ways to try to get links without necessarily needing to earn them.