Back in August 2021, Google began testing this expandable tab search result snippet. Then the test seemed to have expanded in November 2021. Last week, I had countless folks ask me about this again, but I am not yet able to see it myself – but clearly Google is re-testing this search feature.

Here is what a normal snippet looks like (click to enlarge):

Here is what the expandable tab version looks like – in dark mode (click to enlarge):

Here are more examples from some (not all) of the people who shared this with me last week on Twitter but trust me, I had dozens of people email or share examples with me:

Forum discussion at Twitter.