Active opt-in refers to the process of explicitly and consciously giving permission for something to occur or for oneself to be included in a particular action or event. This can be in the form of actively clicking a button, checking a box, or providing a written or verbal confirmation. Unlike passive opt-in, where consent is assumed unless stated otherwise, active opt-in requires a deliberate and intentional action from the individual. This term is commonly used in the context of marketing and data privacy, where individuals must actively opt-in to receive promotional materials or have their personal information shared. Active opt-in ensures that individuals have full control over their choices and are not automatically included in something without their knowledge or consent.