This document discusses advertising and public relations as forms of strategic communication used to persuade audiences. It covers the historical development of advertising through agencies, television, and the internet. Advertising channels discussed include print, electronic, outdoor, direct mail, and digital formats like banner ads, pop-ups, and search engine marketing. Public relations is defined as attempting to persuade gatekeepers like journalists that a client's information is newsworthy. The document also notes changing trends like integrated communications that blend advertising and PR strategies.