You can edit your Messenger channel's introduction Flow from the 'Introduction' tab on the 'Automated' page
The introduction is the very first thing your audience will see when they open your m.me/[facebook page name] link or click the 'Send Message' button on your Facebook page. Consider it the greeting message to your Messenger channel.
By clicking on the 'Get Started' button in Messenger, users will trigger the introduction Flow.
There are exceptions to this, however. When you share a direct link to a Flow. Then, a user will see Get Started (if they haven't interacted with your bot before) and then trigger the Flow you're linking to.
In your introduction it's important to tell your audience what your bot is about and what they expect from it. Are you going to send daily news updates? You may want to ask and have your audience specifically opt-in for such regular updates.
Remember that users are subscribed to the General Updates channel of your bot the moment they click the 'Get Started' button. We strongly recommend adding a double opt-in (DOI) to your introduction Flow.
It's also a good idea to keep your introduction short and simple, don't overwhelm your audience with too many options. Focus on letting them do or understand one thing.
If you want to end your introduction Flow in a menu, we suggest using one or more gallery components, with buttons linking to external websites/additional flows. These gallery components show up as cards in Messenger, and help keep things neat, tidy and aesthetically pleasing.