What is above the fold?
The first mention of the term “above the fold” was in the newspaper industry, where headlines or advertisements were placed at the top of newspapers. Now, “above the fold” is a part or section of your web page, which is visible without scrolling page down. Screen resolution and the guest’s browser window size determine where the part appears.
It is important to choose right words and information, which this part will contain. This is the first part of your web page, that your guests can see. Your main site functions should be visible there.