To connect and integrate the Callbell Shop catalog to Facebook Business Manager it will be necessary to verify your domain in the Facebook Business Manager. Login to the Facebook Business Manager admin and select "Business Settings".
Then enter "Brand Safety" -> "Domains" and click on "Add".
Add the domain of your online shop (without https or www). Ex: example.callbell.shop
Once the domain is added, select "Add a meta tag to your HTML source code" and copy the code. Ex: <meta name = "facebook-domain-verification" content = 347nyg>
Now enter to the admin of your storefront at www.callbell.shop and go to the shop tab inside the control panel and paste the code in "Domain verification".
Finally, go back to the "Domains" tab of the Facebook Business Manager and click on "Verify". At this point, the domain should appear as "Verified" (this process may take a few hours before receiving confirmation from Facebook).