I know this may sound dumb but can someone clearly define some of the words they use for the chart on kworb.net

I'm pretty sure what most of them are but not all of them so tell me if I am wrong.

Spins= The amount of times the song is played.

Bullet= ??? Idk what this is

Aud= Audience? The amount of people who listened to it?

Thanks I am trying to tell tell someone what the numbers mean on the chart but I want to make sure I know my stuff. Thanks for anyone who can help.