Above The Fold is the initially visible part of a webpage.

Above The Fold refers to the part of the web page that is visible to users when the web page is first loaded. Naturally, users interact more with this part of the page than the lower part of the page as it is the first thing they see and it is not always made obvious that users need to scroll down for more information. Therefore, a site's Above the Fold is where the most important copy should be placed but it also needs to look attractive and enticing, so it should not be overcrowded with information. Basically, it is all about balance.