Conversion refers to the act of persuading a user to take a desired action, such as making a purchase, filling out a form, signing up for a newsletter, or downloading an app. Examples of conversion include completing a checkout process on an e-commerce site, subscribing to a service, registering for an event, or clicking on an ad. Conversion can also refer to non-monetary actions such as engaging with content, sharing a post on social media, or leaving a review.