We'll be running different sorts of Events this game, to give something for everyone. Some of them are part of your trials, while others are more to provide story and character development, as well as giving more life to the world of the PCs.
Mandatory: This means that the PCs are obligated to attend, usually because it is a formal test of your capabilities or because the teachers have called you all in. While we as GMs are not forcing players to attend if they really don't want to, there can be IC consequences for your character not to attend.
Limited: Unlike Mandatory events that are open for all, Limited events will have a limited number of slots open. We ask that people are considerate when it comes to Limited Events and try to give everyone a chance to participate in them. The GMs will aim to advertise somewhat what Limited Events will involve so that you as players can know if this is something suited for your character or not.
Activity: These aren't really Events as such, but they are things that will go up in the Daily for people to interact with. On Coruscant, this will be Open Classes. As students going through your trials now, you are no longer bound to a regular schedule like the younglings in the Temple are, but Open Classes are still activities of learning and for interaction with NPCs and other PCs. In short, we want to avoid feeling like there is nothing happening in the world, so we're trying to make it easy for everyone to find something to interact with.