These new changes will go into effect next year, beginning on January 10th. From that point on Google will start lowering the rank of sites “where content is not easily accessible.
REASONABLE” BANNER ADS ARE STILL OKAY
For the most part, Google is targeting overlays that gray out the content beneath them to prevent you from reading a website, either for a few seconds or until you find and very carefully tap a little X to dismiss them. These count regardless of whether they load immediately after a page is opened or whether they appear after scrolling a certain distance. On top of that, it sounds like Google will also count ads that create the effect of a pop-up without actually being a pop-up, by taking up most of the page after a site is loaded (you may have seen one of these if you’re reading this article on mobile).