This document provides an overview of search engine optimization (SEO). It discusses what search engines and SEO are, and covers both on-page and off-page optimization techniques. On-page optimization involves factors like meta tags, headers, images, and site maps that can be optimized on the website itself. Off-page optimization refers to activities off the website like link building, social media promotion, and content submission to other sites. The goal of SEO is to improve a website's visibility and rankings in search engines.