The document discusses affiliate marketing, including what it is, market size and trends. It defines affiliate marketing as a sales channel where advertisers compensate publishers for generating sales or leads. Key points include that the US affiliate revenue market is larger than video, social and mobile combined; there are over 20,000 brands with affiliate programs but only 300,000 active affiliates, with the top 30,000 driving most sales. The document outlines industry trends for advertisers and publishers and provides tips for affiliate marketing success, including managing programs actively and communicating regularly with affiliates.