Tags are keywords that you can assign to vehicles, drivers and markers. Typically, tags represent special skills or properties that you might need for certain jobs. They also provide a mechanism for you to define your own groups of vehicles, drivers or markers.
Use them as a filter on the map to see where all the vehicles, drivers or markers with a specific tag are located. This can be especially useful if you are trying to locate the nearest vehicle to a location that has a specific attribute.
Use them as a search term on the details panel of the hierarchy to access the set of all vehicles or drivers with a specific tag.
In addition, depending on your account, certain tags can be defined and used that have special, pre-defined meanings.