@Laurent, Christopher M I have been working with App Services for a decade and this is something I still have to check on myself so don't be alarmed.
Here’s a brief explanation:
- Production Slot: This refers to the actual live, production site itself.
- Master Slot: This is typically a staging or pre-production slot where you can deploy and test your changes before swapping it with the production slot.
So, in the illustration, the Production Slot is indeed the live site, and the Master Slot is a staging environment used for testing before going live. This practice helps ensure that your live site remains stable and only receives thoroughly tested updates.
If you have further questions or concerns, please reply to this answer so I can assist you further.