A lot of the time, you open the frontend and play with specific changes via the console or style tab to make some changes before you add them. With ScrollSync, it will Sync the fronted position with the Editor preview position so you can add changes to the desired element. Another use-case is that you have immediately preview of fronted with Editor. So you don't need scroll fronted ever. It works in both directions, so it does not matter where you scroll. It will keep previews in sync.