The vehicle's data panel is the left side panel that appears on the Online Map section after selecting a vehicle.
This will include all sorts of useful data about the vehicle like the vehicle's name, where it is now, and its current status (such as driving, stopped, or idling), and which driver and trailer are assigned to the vehicle.
The rest of the information depends on the data sent by the telematics device installed on the vehicle, the details added in the vehicle's settings, and the solutions enabled for it.
It can include:
Mileage, engine hours, and supply voltage
Distance, driving time, and stopped time for today
Video cameras
Fuel levels and refuelings
Driving rating
Service reminders
Accessories, such as alarms and sirens
Other vehicle data, such as temperature, power and gps status (if available).