This document provides an overview of search engine optimization (SEO). It discusses what SEO is, the different types (black hat, white hat, gray hat), and techniques (on-page and off-page). On-page optimization focuses on elements on the website like content, keywords, load speed, and links. Off-page optimization involves activities outside the website like links, social media, and press releases. Major factors for ranking are content, mobile friendliness, and local searches. While SEO provides benefits like traffic and awareness, there are also disadvantages like investment and dependence on search engines. The conclusion emphasizes the importance of quality content, mobile optimization, and a long-term SEO strategy.