Activating the Messenger channel
After you’ve confirmed your store’s eligibility for the Messenger channel, you need to add it to your Shopify admin so that your customers can sign up to receive Messenger notifications on the payment page of your checkout.
You can add the Messenger channel from the Sales channels page in your Shopify admin.
To add the Messenger channel:
From your Shopify admin, click the
+button beside the Sales channels heading.
On the Add sales channel dialog, find Messenger within the list of available channels, and then click Learn more.
Click Add channel.
In the Messenger section, review the terms and conditions and then click I've read and accept the terms to continue:
After you've accepted the terms and conditions, click Enable to add the Messenger channel to your Shopify admin:
Click Okay to authenticate with Facebook:
Click Okay to confirm:
You have added the Messenger channel to your Shopify admin and enabled it. Customers will now be able to see the updates widget on your checkout page.