Microsoft Bing is testing adding an "official site" label in the search results. If you search for a specific site, you may find that Bing adds to the title of the search result snippet the words "Official Site."
This was spotted by Shameem Adhikarath and posted on Twitter, but I cannot replicate it myself:
I don't see this, this is what I see:
Here are more screenshots:
Bing has started labeling some search results with 'Official Site' on their title.@rustybrick pic.twitter.com/8EO0VBxf8q
— Shameem Adhikarath (@shemiadhikarath) March 26, 2023
I believe other search engines have tested this in the past as well.
Forum discussion at Twitter.