Google has stated that they are making a tweak in their search algorithms.
The company said that pages that show usable content above the fold are going to perform better compared to pages that have too much useless stuff at the top of their web pages.
Google said that this is based on feedback from users who complained about web pages that are not very useful until you scroll down to skip the ads and other elements.
We understand that placing ads above-the-fold is quite common for many websites; these ads often perform well and help publishers monetize online content. This algorithmic change does not affect sites who place ads above-the-fold to a normal degree, but affects sites that go much further to load the top of the page with ads to an excessive degree or that make it hard to find the actual original content on the page. This new algorithmic improvement tends to impact sites where there is only a small amount of visible content above-the-fold or relevant content is persistently pushed down by large blocks of ads.