One of the difficulties in learning about SEO or Search Engine Optimization is in staying up to date, especially as Google is constantly changing their algorithm and settings. To keep up with Google you need to follow Google and the people at Google who are working on the SEO updates and changes.
The main person I follow is Matt Cutts who is the head of their Spam Team and is in charge of how the Google search engine handles "black hat" SEO. Here are some useful links to follow Matt Cutts and also follow the Google Webmaster team. Since I am a video guy two of these links are for YouTube channels.