The document discusses search fundamentals, including search engine marketing (SEM). SEM involves search engine optimization (SEO) to improve organic rankings and paid placement advertising like pay-per-click (PPC). SEM aims to increase visibility on search engine results pages (SERPs) through paid and unpaid methods. It explains how SEM works through keywords, relevant ad text and landing pages to achieve a high quality score and outrank competitors. The importance of search is also covered, as search allows targeted exposure to customers actively searching online.