Legacy: How do We Calculate the Estimated Audience for Facebook Audiences?

πŸ” Please note: This article is for customers on Standard Bundle, Enrichment, or Clearbit Platform plans. If you signed up in 2024, you are on a Sales Intelligence for HubSpot plan: Free, Growth, or Business.

Last Updated:Β November 8, 2022

This article explains why you may see a discrepancy between Clearbit's Estimated Audience and Facebook's Estimated Audience size:Β 

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This number is an estimate based on the historical match rate between audience size and Facebook.

For instance, assume that our historical match rate with Facebook audiences is 30%. When building an audience, Clearbit will query the entire data set with the given conditions and multiply that total by 30%. This new total will be the number displayed on the page.

πŸ“ Please note:

  • Since this is an estimate, the numbers will very rarely be the same.Β 
  • If your Facebook audience is smaller than your Clearbit audience, make sure you wait 24 hours for sync to finish fully.Β 
  • If you are using a site visitor audience, these audiences aren't retroactive so it will take time for you to be able to retarget your site visitors.