This document discusses search engine optimization (SEO). It defines SEO as setting rules to optimize websites for search engines to improve rankings. Good SEO is important to get traffic, increase trust and sales. Search engines look for relevant, high-quality content and good user experience. White hat SEO follows guidelines, while black hat SEO exploits weaknesses. SEO services include audits, on-page optimization, content development, link building and code optimization. The document provides dos and don'ts of SEO.