Search engine optimization or SEO is the art and science of ranking websites high in the search engines. It is more of an art than a science and because of that there are so many unknown variables. When there is so much unknown, there are a lot of theories and myth and half truths. Many newcomers to SEO seem to get several half truths, usually in SEO forums, and combine them together to come up with some of the more popular SEO myths. The best way to avoid the myths is to starts with some good overview SEO books before hanging out in SEO forums.