If an app wants to use specific features and personal information on your phone, it must ask for your permission. You can manage permissions at any time to allow, deny, or modify them.
If an app wants to access (use, view, change) these features, it must ask you for permission:
Before you give an app permission, it’s important to review what the app’s asking for. Make sure you're okay with what the app wants to do before you say yes.
Android apps can still work even if you don't give them all the permissions they ask for. For instance, an app might not need to know your location or see your contacts to do its thing. But, if you do allow it access, the app might work even better. It's a trade-off. On the one hand, you can limit what info the app knows. On the other hand, you might miss out on cool features.
You'll see permissions screens:
If the screen pops up over another app, tap to allow full access, partial access, or to deny the app access.
If the screen takes you into Settings and flashes a setting:

The first time you use an app, and sometimes when you install or update it, you are asked to grant the app permission to access certain data and phone features. You can adjust these permissions any time.
To adjust permissions by feature:
Go to Settings > Security & privacy > Privacy controls.
To adjust permissions by app:

Turn each permission on or off as needed.
