Formatting has nothing whatsoever to do with how the CSS functions. These are merely aesthetic choices by the coder. But thatâ€™s not to say formatting isnâ€™t important. That would be like saying the choice of canvas isnâ€™t important to a painter. It affects how it feels to write CSS, how easy it is to read, how easy it is to navigate, and how easy it is to revisit and reacquaint yourself with previously written CSS.