Event ID: Use numerical IDs for events created in HubSpot (Reports > Analytics Tools > Behavioral Events)
Event Name: Use string names to dynamically create new events. If an event with that name doesn’t exist, it will be created automatically
Events created in the HubSpot app cannot be triggered by name, only by ID
Events created dynamically by name can only be created once. If you delete an event that was created this way, a new event will not be created if you try to dynamically trigger an event with the same name