In an effort to deepen the demand for an ad placement, your ads may have flexing technology enabled. This means that instead of only a Medium Rectangle 300×250 displaying in the sidebar, a Skyscraper 160×600 or Half Page 300×600 ad may take a turn. When the auction takes place for each ad on your site, we take the highest bid offered, whichever size that may be. Running flex technology on as many of your ad placements as possible creates more demand and more revenue from a single ad placement than if only one size were enabled.
If you are seeing the page and your content adjusts because of the resizing of an ad, changes to the behavior of the ad can be made. Visit the Tools section in the Console and select “CLS.” From there, enable “CLS Optimizations” and select “Non-Collapsing + Shadow Boxes” for both desktop and mobile to create an optimal user experience and aesthetic for multi-sized ads on your site.