Why do we have to mention the word controls in the audio tag?

Question

Why do we have to mention the word controls in the audio tag? and why when we delete it the audio player doesn't appear?

Regards.

Answer 1

To allow user control it (play, pause ...)

It is the user-interface (UI) of audio

Answer 2

Yes but it exists.

Answer 3

So if I removed it why the audio player doesn't appear at all?