Hi Rani,
Support directed me to this page yesterday. It's really helpful for program nurture, setting up various campaigns within a program. Understanding how the traffic cop works when you're running different campaigns. It first goes into the RCA, but if youi're not setting or tracking that up, I'd skip to the nurture programs. https://community.marketo.com/MarketoArticle?id=kA050000000Kytv&src=comm