Please prepare a Facebook page first.
Go to Settings → Messaging → Add Messenger to your website → Get Started
Add your website address like below and copy the code.
Paste your code in the admin.
cleanUrl: /en/guides/plugins/facebook-chat-plugin
There is a Facebook chat button on the bottom right corner. Try it first. Now you can guess what it is. Visitors can use this plugin to communicate with you.
Please prepare a Facebook page first.
Go to Settings → Messaging → Add Messenger to your website → Get Started
Add your website address like below and copy the code.
Paste your code in the admin.