The 2 tram lines in Dijon are a great way of getting around the city. They are new-ish, clean, and very easy to use. It’s easy to buy the Mobigo tickets at the machines at each stop (note that it’s coins only, or a bank card). You can also use the ticket to transfer to a bus, if it’s within an hour.
On weekdays they run about every 7-8 minutes and about every 15-18 minutes on Sundays.
You get on, validate your ticket by tapping on the special stand, and check your stops on the monitors.
Locals also buy weekly and monthly passes.
Mobigo can also be used elsewhere in Burgundy apparently, but I need to check that out.