Cap rate vs. cash-on-cash

[Connor Wentling]

Hello!

I am just getting started in real estate investment and am working on purchasing my first rental. When analyzing a potential deal, which is a better indicator of a smart investment, cap rate, or a cash-on-cash return? I'm vaguely familiar with both terms and am trying to get much more familiar with them quickly, but figured using the brainpower of the Bigger Pockets forum wouldn't hurt!

Thanks for any help!

Connor