I've written this article for people trying to get some basic grap of what SEO really means and how it should be used. I'm explaining purpose of the SEO, what you should avoid on your websites for better SEO and also I'm explaining how to choose the right keywords and how to place them properly on your site. Additionally, I'm also talking about semantic elements and their practical meaning for SEO and I compare logical formatting to physical formatting. I hope you enjoy it and will get much new information from it.