What is what in science communication?

Scientists wishing to talk to a broad audience about their research have more opportunities to do so than ever. But unfortunately, the variety of science communication events can also create some confusion and leave scientists wondering: Which format is right for me? What do I have to prepare? Am I even eligible to speak?
To clear up some confusion and also help interested non-scientists find the most suitable event to attend, here's a little "who is who" or rather "what is what" of events aimed at science communication!