This document discusses search engine optimization (SEO) and search engine marketing (SEM), also known as pay-per-click (PPC) advertising. It aims to help the reader understand the key differences between SEO and PPC and how to determine which approach is most valuable for their business goals. SEO involves optimizing websites to rank higher organically in search engine results pages, while PPC involves paying to promote websites through paid search listings. The document recommends a balanced approach using both SEO and PPC techniques.