Please note that Facebook updated its broadcasting permissions on March 4th 2020. You can read more about it here. You must make sure you fit the criteria before you send a broadcast.
To be able to send someone a broadcast message away from their initiated conversation, you need to get them to explicitly opt-in to receive broadcast messages otherwise you can’t send them a broadcast.
Step by step guide
Step One – Add a button to a message
You can add buttons to text parts and carousel cards.
Step Two – Set the button to segment
Once you add a button, click on the cog, which brings up a modal showing you the button options.
From this screen, select “Segment” as the button type, and then select either “Opt-in” or “Opt-out”.
Next, select the message to send after the bot user hits the button.
Finally, choose or create the segment the user bot will join. We recommend always using segments as much as you can.
It’s good practice to explain to the user exactly what they are subscribing too, and also confirming their subscription and giving them an extremely easy way to unsubscribe.
Step Three – Save
As always, once saved make sure you push the changes live, and then you are done.