This document presents an introduction to search engine optimization (SEO). It discusses what SEO is, why it is important, common tools used, structured data techniques, and provides a summary. SEO involves modifying websites to increase their organic search engine rankings. It is important because the majority of consumers begin their product/service searches on Google, and the top search results receive over half of all clicks. Common SEO tools audit websites, track keywords and trends. Structured data like rich cards and knowledge graphs enhance search results. Overall, SEO is a valuable strategy that builds trust, is measurable, and provides a relatively cheap form of marketing and traffic.