The "Foot-in-the-Door" technique is a psychological strategy used in persuasion. It involves making a small request first, which is likely to be accepted, followed by a larger request. This method works because agreeing to the initial small request can create a sense of commitment, making individuals more likely to comply with subsequent requests. This technique is often used in various fields, including marketing and sales. For example, a salesperson might first ask a customer to sign up for a free trial of a product, and later request a purchase. This gradual approach can lead to higher acceptance rates for larger requests.