Google Now Officially Showing Mobile Friendly Labels

Since 2012, Google has been testing mobile-friendly labels in the search results. Most recently, Google ramped up those tests by testing mobile icons, not mobile friendly icons and text based mobile friendlylabels. Last night, Google started rolling out the mobile-friendly text labels in the mobile search results.
If you pull out your smartphone and search for something in Google, you will probably see some results labeled as mobile friendly.

https://www.seroundtable.com/how-to-get-google-mobile-friendly-labels-19460.html