Google's Mobile Search Results now showing thumbnails

Hi, I have been trying for months, unsuccessfully, to get Google to recognize code that will ask them to put a thumbnail image next to my website in the mobile search results. They have been doing this now for a couple of years, and recently really increased the thumbnail images in their mobile search results.

The code from the google website says to put this code in the html:

I have put this code into “tracking and analytics”, the location for the image I got by right clicking the image and opening it another tab. However, this just hasn’t done the trick, no thumbnail images appearing.

Any input would be awesome, thanks :slight_smile: