There's some info from a few years ago here: https://search.googleblog.com/2012/01/page-layout-algorithm-improvement.html https://search.googleblog.com/2012/01/

There's some info from a few years ago here: https://search.googleblog.com/2012/01/page-layout-algorithm-improvement.html https://search.googleblog.com/2012/01/page-layout-algorithm-... The short of it is that Google penalizes pages if too big a percentage of the above-the-fold content is filled with ads. So if you want your pages to rank highly, you need to keep the ad real-estate reasonable. However, once someone gets to your site via a highly ranked landing page, there's nothing stopping you from getting a user to click on an internal link that takes them to a much more ad-filled page (which doesn't itself rank highly on Google).