What is the importance of settings permissions in app development?

It is directly connected with the data privacy which is hot trend after facebook tragedy.

Consider this example:

If you give permission to any app to get your location then app owner may store your locations in server in order to determine your daily routine.

This is the small example, app owner can do plenty of other things without even your knowledge when you give permission to app.

Hope you get the importance of app settings in android app development!

The permission allows certain restrictions to be imposed primarily to protect data and code. Without this, codes could be compromised, resulting in defects in the actual function.