This document provides an introduction to search engine marketing (SEM). It discusses how search engines work and the importance of search engine optimization (SEO) and search engine advertising (SEA) strategies. Key points include how search results are ranked based on page rank and relevance, the difference between organic and paid search results, and factors for success like keywords, landing pages, and backlinks. It also provides recommendations for analyzing site traffic data and segmenting the target market for SEM campaigns.