It seems like Google Analytics is now showing some of Google Discover traffic, likely from the Google News Showcase. If you check your acquisition, source and medium traffic, you may see [newsshowcase / discover] in the list.

Vishal Marathe was the first to spot this and post about it on Twitter, from what I can tell:

Valentin Pletzer and Glenn Gabe dug in and discovered this was likely coming from the Google News Showcase product. Valentin wrote “Looks like Google News showcase does attach utm-parameters to the URLs.” Glenn Gabe added “Yep, I’m seeing that too starting on Thursday 7/29. And when you dimension by country, it’s from countries running Google News Showcase.”

It also can show up in your real time view in GA:

This is a nice addition but it does not yet show all Google Discover traffic yet, I don’t think.

But maybe?

Forum discussion at Twitter.

Update: This might be a bug or not working as expected – but it seems the GA team is working on bringing us this Discover and/or News Showcase data: