Affiliate marketing is a type of performance-based marketing in which a business rewards one or more affiliates for each visitor or customer brought by the affiliate’s own marketing efforts. Affiliate marketing overlaps with other Internet marketing methods to some degree, because affiliates often use regular advertising methods. Advertising is an audio or visual form of marketing communication that employs an openly sponsored, non-personal message to promote or sell a product, service or idea. Sponsors of advertising are often businesses wishing to promote their products or services. Advertising is differentiated from public relations in that an advertiser usually pays for and has control over the message.