Hey Alyssa,
I think it comes with the Campaign History already visible and enabled (but I've never set up a SFDC instance or been an admin). And let me specify that with SFDC I'm referring to SFDC campaigns (not smart campaigns).
Here is where you see them on a contact or lead page (along the very top)... (or you can scroll down and there's a section there too depending on what views you have set up).