Yes, I am using cornerstone. The problem is that I have Mediavine Ads installed and Google is picking up some of their ‘report this ad’ text on my snippets and meta descriptions. I’m afraid that it’s making my site look spammy. (See photos below)

Mediavine was unable to diagnose the issue because they haven’t seen it occur before. So they suggested that I add a < div > tag before my H2 tags and </ div > after the image to see if Google will stop picking up the “Report this ad” text.
How would I be able to do that? Or do you have any other suggestions?
I appreciate your help! 
Nadia