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 increases the likelihood of compliance with the subsequent, larger request. This technique is often used in sales and marketing, where a salesperson might first ask for a small favor, like signing up for a newsletter, before asking for a more significant commitment, such as purchasing a product. The approach relies on the principle of consistency, where people prefer to act in ways that align with their previous commitments.