We’ve been using a ton of ChatBots lately with Facebook Messenger. This is an awesome way to get high inbox rates/delivery to your target audience, and great engagement. The following guide shows how to make a facebook custom audience based on specific action (ie when someone clicks a button in your many chat bot, or when they complete the chat bot sequence, or whatever your specific objective might be)
You can then re-target this custom audience with Facebook Ads, or generate lookalike audiences to build your subscriber count on the chatbot.
First of all, You need ManyChat PRO account ($10/month) to use the Export PSIDs menu is Bulk Actions, Audience page.
Add a tag [eg. “To Custom Audience”] to the flow step which you want to make Custom Audience