Some apps give you the option to make and manage phone call . What does this do?

[AC Question]

For example Samsung gear asks this when you start it. You then allow or deny the option.

 

[the tall guy]

Hi, it's just your phone asking for your permission for said device or app to use the dial feature. I presume you can call or answer from your Samsung Gear? this is asking you to allow this process.

 

[chanchan05]

The Gear can show you an incoming call and dismiss it. It can't dismiss the call if it doesn't have the permission.