what is the context of an event
Event Context. An Event Context allows specification of an event which is needed to activate its profile e.g. SMS received, screen has gone off. Events are a little different to other contexts because they are instantaneous whereas other contexts usually have a duration. This means that it is nonsensical to specify that e.g. the screen brightness should be set to X for the duration of the event, so Tasker assumes that all settings actions should persist beyond the event.