Automatic scrolling in the Automator means that, when triggering a Block (or Item) in your Rundown, the list of triggers (Blocks, Items) will scroll automatically so that the actively triggered Block goes to the top of the screen. This way no manual scrolling is needed and the following Blocks (or Items) are shown underneath immediately.

To enable Automatic scrolling, go to the gear icon in the top right corner, then select 'Automatic scrolling'. That's it.