Is a different Ad unit ID required for each level? [SOLVED]

Hi all, I'm researching into game monetization and was wondering if you need a different Ad Unit Id for each level or if you keep the same one throughout the game?  any info or advice would be great thanks.

I guess you mean the ad Unit id for Admob...if this is the case then you'll only need one Unit id  for an entire game.

Hi, thanks for your reply, yea it's for Admob.  Thanks for your help!