The way I read it, it's something your listing achieved in the last 3 months ("Every three months, you’ll get personalized insights on your last quarter"). It doesn't say on what date it was achieved, how long it stayed in that position, or in how many 24-hour cycles it was achieved.
I guess it's like telling a parent that their kid won a race sometime during the last term 🤣
It only makes them wish they were there to take a photo (or a screenshot, in this case) ...