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Meta Business Help Center

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About Customer List Custom Audiences

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About Customer List Custom Audiences

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Changes driven by ongoing efforts to align our products with evolving privacy rules in Europe may impact campaigns advertising to people in the European Region. Learn more about how European privacy directives may affect your ads and reporting.

A Custom Audience made from a customer list is a type of audience you can create to connect with people who have already shown an interest in your business or product. It’s made of information - called “identifiers” - you’ve collected about your customers (such as email, phone number and address) and provided to Facebook. Prior to use, Facebook hashes this information.

Then, we use a process called matching to match the hashed information with Facebook profiles so that you can advertise to your customers on Facebook, Instagram and Audience Network. The more information you can provide, the better the match rate (which means our ability to make the matches). Facebook doesn't learn any new identifying information about your customers.

Note: Targeting options are limited to location, age and gender for audiences that include people under age 18 globally, 20 in Thailand or 21 in Indonesia. You can't use detailed targeting, Custom Audiences, lookalike audiences or saved audiences to target your ads to these age groups. Learn more about the targeting options to reach young people, and how this update may impact your ad sets.

Note: Changes related to Apple’s Identifier for Advertisers (IDFA) in iOS 14 may affect your match rate when matching by Mobile Advertiser ID. You may improve your match rate if you add one or more of the following identifiers to supplement Mobile Advertiser ID: Email, Phone Number, Facebook App User ID, Facebook Page User ID, First Name, Last Name.

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AUDIENCES |

Custom Audiences