How do I choose which delivery to do?

The ROVA platform shows  a preview of the mileage, number of stops and revenue you'll generate with each opportunity.  Once you see an order pop up on your screen, swipe up to get more details.

Once you see the details, then it's up to you to decide if the opportunity will work for you, there's no minimum number anyone must take, only take what you think is best. There's no score or percentage required to remain active. If something works for you great, if not maybe another time one will.