This document provides an overview of search engine marketing (SEM). It discusses why companies invest in SEM and how it can help drive revenue, conversion rates, and return on investment. Key points covered include how SEM works through paid search advertising on search engines, how to target keywords and write effective ads, and optimizing a SEM campaign. Tips are provided on targeting specific audiences and industries. The document also looks at trends in SEM, including the growth of mobile search and new ad formats. Exercises are included to help attendees develop SEM strategies and goals for their own businesses.