A kit is a collection of sounds that you need to create your own productions. Depending on the type you will find different types of sounds: Drum Kits: collections of drum sounds Loop Kits: collections of complete melodies One Shot Kits: collections of instrument sounds that you can use to compose your own melodies VST Presets: Presets of patches from a specific VST (e.g. Serum, Omnisphere, ...)