What is the little hole beside the flash on my Moto G4. Does a case have to have a cut out for it?

[AC Question]

What is the little hole beside the flash on my Moto G4. Does a case have to have a cut out for it?

 

[selw0nk]

I think it's a noise canceling microphone.

 

[jasonandrews25788]

yes ! it's the noise cancellation mic.