Facebook recently released a powerful new option called Custom Audiences. Using the Facebook custom audiences feature, you can now leverage your in-house list of customers for targeting ads on Facebook.
By uploading a list of emails, UIDs, or phone numbers, you can create a custom audience that can be used for targeting Facebook campaigns. The sky is the limit with regard to ideas for targeting your current set of customers, and we’ve been using custom audiences more and more recently.
This capability was also recently expanded with “Lookalike Audiences,” which enable marketers to find segments that generally match specific Custom Audiences on Facebook.