This document provides an overview of search engine optimization (SEO). It discusses what search engines are and how they work by using crawlers to index websites and search algorithms to retrieve and rank pages. The document then defines SEO as improving websites to rank higher for targeted keywords. It outlines the SEO process, including research, optimization, submission, and reporting. Key on-page optimization techniques are covered such as keywords, titles, meta descriptions, and crawler-friendly design. Link development approaches like quality content, directories, blogs and forums are also discussed. The document distinguishes between white hat and black hat SEO tactics.