Google’s last update was a change to exact match domains, this time it’s an update which affects sites with too many adverts and not enough content “above the fold”
Above the fold is a term used by web guys that refers to a web pages content that is visible on the screen without scrolling.
Google really does not want to list websites that are loaded with spam in their search results and this is another step forward to cutting that down.
The action you need to take:
Place more genuine and relevant content “above the fold” so that all the important and relevant information is in view for your visitors