With offline conversion measurement capabilities on Facebook, you can track when transactions occur in your physical business location and other offline channels after people see or engage with your Facebook ads.
According to Facebook – “Create a list of the people who interacted with your business in-store, by phone, or through other offline channels.”
How to use Offline Activity feature?
Go to ‘Asset Library’ tab in Facebook Business Manager.
Now just click on ‘Custom Audience’ tab.
You’ll get the list of custom audiences. Click on ‘Offline Activity’ option.
Add multiple filters to refine the audience as per the requirement.
Enter the name of the audience related to your objective and click on create anaudience. Your audience is ready.