On-Site SEO. As opposed to Off-Site SEO. Learn what you can do on your own site to increase your performance and ranking. You'll find stuff about making your website faster, using semantic web techniques, and more.
One of the most basic concepts of SEO and yet many marketers just skip this step in their keyword research. Many "content creators" gloss over it when writing their content. It boggles the mind. Let's get into it.