When adding Etsy listings to Facebook or Instagram Shops, you’ll get a prompt from Facebook to verify your domain. You’ll need to verify your domain on Etsy.com using a code generated by Facebook Business Manager. 

To verify your domain on Etsy.com:

1. Login to Facebook Business Manager and navigate to domain verification page.
2. Add a new domain and enter your shop URL in this format: shopname.etsy.com 
3. Copy the meta-tag verification code provided by Facebook. 
• Navigate to the meta-tag verification tab.
• Copy just the alpha-numerical characters in quotation marks at the end of the code.
4. Sign in to Etsy.com. 
5. Go to Shop Manager. 
6. Click Settings. 
7. Click Facebook Shops. 
8. Paste your verification code from Facebook into the Your domain verification code box. 
9. Click Confirm. 
10. Return to Facebook Business Manager domain verification page and click Verify.

You’ll see a confirmation that your domain is verified. You can now add products to your Facebook catalogs using your listing URL:  shopname.etsy.com/listing/ID#

Note that in addition to Etsy’s Terms of Use, your use of Facebook or Instagram Shops for your Etsy Listings is a product of Facebook, Inc., and is subject to Facebook’s Terms of Service (including its Business Terms of Service).