Did you know that only 4 – 6% of people read below the newspaper fold of your website? To understand that, you have to imagine your are travelling on the NY subway or London Underground. There is always people reading their newspapers, but to take up less space, they need to fold the paper.
So if you look at a website, it is similar to the section that they have to scroll to visit.
Why is this important? Well if you want to catch someones attention and call them to an action, it make sense for it to happen on the top part of you website. But that might not always be possible, this is where you can use — Read More — buttons, so that people know where to go for additional information.