Proceedings
Most conferences have some kind of proceedings, a - in most cases - printed collection of papers for each presentation. This is especially important for scientific conferences, where the papers and their publication in prestigious proceedings help the career of their authors. But any conference can profit from having proceedings. They help the audience, because they don’t have to take as many notes. When they get home they can read about the stuff they have heard (or not, if they missed a talk). This is especially important when the conference has several parallel tracks.