How to get a Facebook Messenger App ID
To add a "Share via Facebook Messenger" button, Facebook requires a unique App ID registered to your organisation. This is free, takes about 10–15 minutes, and doesn't require any technical knowledge.
Before you start, you'll need:
- A personal Facebook account (to log in with)
- A contact email address to associate with the app (something like a team inbox or your own work email is fine)
Step 1 — Go to the Meta Developer site
Open this address in your browser: https://developers.facebook.co...