Too Long; Didn't Read
A Facebook lookalike audience is a segment of users who share characteristics (like their age or hobbies) with people who’ve already engaged with you, meaning they’re much more likely to be interested in your business. Facebook identifies similar people and targets your ads at them, letting you reach a larger audience of probable buyers. You could use a custom audience to find more high-converting prospects using your existing customer data. You can also use a subset of data to get even more precise in your targeting.