Each "bunch" will automate a few things, and they can happen in order. For instance, if you want to record a screencast with audio, you can: switch microphone inputs, turn on Do Not Disturb, hide your desktop, pop up a message that says "remember to speak louder and slower!", and also open a new browser window, all with a single bunch.
Just figured it's worth mentioning, while we're sharing awesome free automation tools.