The Messenger block list is a feature that allows users to control their privacy and security by preventing unwanted messages and calls from specific individuals. To access the block list in Messenger, you need to follow these steps:
1. Open the Messenger app on your device.
2. Click on your profile picture located in the top left corner of the screen.
3. Scroll down to find and click on "Privacy" and "Blocking."
4. You will now see a list of all the people and pages you have blocked on Messenger.
From here, you can manage your block list by adding or removing people at any time. You can also review and unblock someone you may have accidentally blocked. It is important to note that when you block someone, they will no longer be able to contact you on Messenger or see your profile, and you will not be able to see their messages or calls.