Cold calling is the solicitation of business from potential customers who have had no prior contact with the salesperson conducting the call. It is an attempt to convince potential customers to purchase either the salesperson's product or service. Generally, it is referred as an over-the-phone process, making it a source of telemarketing, but can also be done in-person by door-to-door salespeople. Though cold calling can be used as a legitimate business tool, scammers can use cold calling as well.

Sales are activities related to selling or the number of goods sold in a given targeted time period. The delivery of a service for a cost is also considered a sale. A period during which goods are sold for a reduced price may also be referred to as a "sale".