What does Debugging Tools do?

Debugging Tools helps troubleshoot problems with support. Turn it on in Settings → Advanced; it applies only to the device you turn it on for, on iOS and Android. It adds a Tools tab with diagnostic, test-data, and repair actions, shows extra technical details on some screens, and turns on more detailed diagnostic logging. Some Tools actions add sample data or permanently delete data, so only use them when support asks, and back up first under Settings → Backup & Restore. Turning the switch on or off doesn't change your data; turn it off to hide the Tools tab and details again.