SEO is a marketing discipline focused on growing visibility in organic search engine results, not paid search results. SEO focuses on on-page elements like relevant content, keywords in titles and meta descriptions, image alt text, and fast page loading. Off-page elements include natural, unmanipulated links from other sites. Proper keyword research, content creation and linking are important for organic search engine ranking. Common myths include that page rank alone determines ranking, keyword stuffing works, or that paid search helps organic search engine optimization.