Define the term 'custom audience.'

A custom audience on Reddit, like on other advertising platforms, refers to a group of users defined by their prior interactions with your brand. This allows advertisers to re-engage with individuals who have visited their website, used their app, or are on their customer lists. This method is highly effective for retargeting, nurturing leads, or encouraging repeat purchases. The option "An audience with custom-made ads" is incorrect because custom audiences define who sees the ads, not the nature of the ads themselves. "An audience that is new to your brand" describes a prospecting audience, the opposite of a custom audience. "An audience that is not custom" is a tautological and unhelpful definition.