What feature can help advertisers in refining their target audience?

Custom Audiences is a powerful feature that allows advertisers to refine their target audience by using existing customer data. By uploading lists of contacts, advertisers can create a specific audience segment consisting of users who have already interacted with their brand, whether through website visits, prior purchases, or engagement with previous ads. This targeted approach helps businesses reach individuals who are more likely to convert because they already have a familiarity with the brand.

In contrast, engagement metrics provide insights into how users interact with content but do not directly help in refining audience targeting. Retargeting lists are beneficial for reaching users who have previously interacted with specific content but are a step that typically follows the initial audience creation. Click-through rates are essential metrics for measuring ad performance but do not assist in defining or refining the audience itself. Therefore, Custom Audiences stands out as the most effective method for tailoring outreach to a specific group of individuals based on known data.