The agenda ist the most important topic of AllEvents, the richest one in features too: you can assign to an agenda a thumbnail, a color, a template, a description model, ... and all other topics are all dependant ones: an activity, a target public, a section are second level information of an agenda.
As soon as you want group your events depending on a criteria (school, sportive cultural, associatif, ...), the agenda topic is designed for that.
The venue is dependant on your event. You can create your venue directly from an address and you can fine tune the exact localisation on a map (very usefaul when the meeting point is on a beah...). The venues allow to display your events based on a Google map view more much plus fun and visual to your users!
Now, you can create and customize your first events with these two unavoidable elements.