The Reciprocity Principle is based on the idea that when someone gives you something, you feel obligated to give something back.
In marketing, this principle is applied when a company provides something of value for free, and in return, expects the recipient to provide their contact details or attention.
A common example is when a marketer offers a free white paper in exchange for the recipient's name and email address.
Small gestures, such as offering candy or personalized gestures, can significantly influence customer behavior and increase engagement.