Event categories relate to the visual display of the event on the calendar, allocating a colour to an event type. Teams can create a colour-coding system based off their own individual needs. For example, each department may be assigned a different colour to allow people to recognize when an event applies to them.
Event categories will contain specific event types below them. As example of an event category could be Training or Meeting. Using this example you would have the overall category of 'Training' and then a specific event type underneath this called 'Weights', 'On Field', 'Match Simulation' etc