An On Ramp is a series of classes that teach you how to learn the basics of a topic. (i.e. CrossFit, Olympic Lifting, Ninja Warrior Mobility etc)
The new On Ramp functionality is an update and add-on to the drop-in feature.
You'll see the new dashboard icon here:
Similar to your drop-ins list, which will show you anyone who has used your drop-in link, the On Ramp list will show you anyone who as paid and scheduled a class on your On Ramp schedule using your On Ramp link.
Your On-Ramp link can be found inside TRIIB SETTINGS>TRIIB URLS>
https://[Enter Gym Name Here].triib.com/on-ramp/