Telemarketing is a form of direct marketing where a salesperson uses the telephone to solicit prospective customers to sell products or services.

The prospective customers are identified and qualified by various means, including past purchase histories, previous requests for information, credit limit, competition entry forms or application forms. Names may also be purchased from another company's customer database, or obtained from a telephone directory or some other public list or forum. The qualification process is intended to find those prospective customers most likely to purchase the product or service being sold or advertised. Charitable organizations, alumni associations and political parties often use telemarketing to solicit donations.