This code line is telling the window to scroll to the top left corner of the page. The first 0 is the x-coordinate, and the second 0 is the y-coordinate.
The scroll event can be used to keep track of where the user is scrolling, and to provide feedback to the user. For example, you can use the scroll event to update a scrolling indicator onscreen, or to trigger an animation as the user scrolls through a document.
Control scroll in devices