It’s easier to sell to current customers than to look for new ones, so strengthen your existing connections by using Custom Audiences. We’ll compare your data with ours to help you find the people you know on Facebook.
If you have a customer list or data from your site, like purchaser email addresses, you’re ready to get started.
Once you create your Custom Audience, your information will be encrypted to protect customer relationships and you’ll be set to reach more people on Facebook.
Creating your Custom Audience
Getting started is easy. Just follow these steps:
Create a list of either email addresses or phone numbers using your customer data
Save your list in CSV or TXT format
Go to the Audiences tab in Ads Manager
Click the Create Audience button, select the Custom Audience option and then choose Customer List
Upload the CSV or TXT file list you previously saved or easily drag and drop your file to the Custom Audience box
Your Custom Audience will be ready in about 30 minutes
Detail the tip: https://www.facebook.com/business/a/custom-audiences