Click Settings in your admin panel.
Note: Depending on which page you’re on, you may need to click Site on the top banner of the page before you go to Settings.
Under the Advanced section, click Custom Code.
Under the Head section, click Add Code.
Paste the code in the Paste the code snippet here section and insert an easily identifiable name (like Messenger) under Add Code to Pages.
Select All pages, then Load code once.
Under Place Code in, make sure Head is selected, and click Apply.
Click Publish on the top of the page.
Customers can now message you from your website, and your messages will be shown in your Business Page Inbox.
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