This document provides an overview of search engine optimization (SEO) and why it is important. It defines SEO as the process of getting organic traffic from search engines. SEO helps ensure websites are accessible to search engines and rank higher in search results, increasing the chances of being visited. Higher rankings lead to greater brand awareness, traffic, and return on investment. The major search engines are identified as Google, Yahoo, Bing and Yandex. SEO tools can help optimize websites by analyzing important factors like keywords, content, backlinks, and social media.