SEO is one of the most important marketing activities available to companies and publishers. Inorder to help clear away some of the facts for those who are unfamiliar to SEO, Search Engine Land has created “The Periodic Table Of SEO Ranking Factors.”
As per SEL, there is a science to SEO. Search engines reward pages with the right combination of ranking factors, or “signals.” SEO is about ensuring your content generates the right type of signals.
To download the complete periodic table refer to the source: SEL