Netx is a digital advertising agency founded in 2001 based in NYC that specializes in performance marketing. They have 25 employees and work with major clients like Dick's Sporting Goods, Financial Times, and Conde Nast. The document discusses search marketing, which involves driving interest, leads, and sales through paid and natural search on platforms like mobile, social, and display. It also covers affiliate marketing, where publishers are paid commissions for generating sales and leads. Tracking analytics is important for both search and affiliate marketing to analyze trends, competitors, and optimize campaigns.