If WU "likes" your station data for 5 consecutive days, you get the little gold medal next to your station ID.
Well, mine disappeared when I had the station down for maintenance. No surprise. But a couple of other times, it has vanished when I thought all was well. I look at CWOP to see my station analysis but that has no impact on WU.
How does WU analyze my data? I don't have to get a medal, but if something is wrong, I would like to know what, so I can decide if it's something I need to fix.