How do you differentiate between using a first-party customer list and third-party data when building a custom audience based on compliance and data management rules?

The key differentiation between using a first-party customer list and third-party data when building a custom audience lies in the source of the data, the level of consent required, and the compliance obligations. A first-party customer list consists of data you've directly collected from your own customers, such as email addresses or phone numbers gathered during transactions or through opt-in forms on your website. Because you have a direct relationship with these customers, you're responsible for obtaining their explicit consent for using....