The source – twitter.com
Google tests keyword labels in mobile search snippets.
The experiment was noticed by SEO consultant Brodie Clarke and reported on Twitter:
“... right now the 'keyword' shown in the screenshot is not actually mentioned on the page – it was created by Google,” wrote Clarke.
It just keeps coming back. I've seen this "keyword tags" test many times over the past 6 months: https://t.co/ZYKE9lc3XX. But it always feels like it's in a slightly different form. The "keyword" shown in the screenshot isn't actually mentioned on the page – Google created it 🤔 pic.twitter.com/E2R0raHloQ— Brodie Clark (@brodieseo) July 4, 2021
Prior to that, Google used the words and phrases contained on the pages.