Less than a month ago, there was a major AdWords Quality Score reporting bug which made many advertisers get extremely nervous. The reports showing ones quality score was showing it to be much lower than the true score. This may have caused some to change their ads or boost their cost per click prices, to counter the report.
The thing was, it was just a reporting glitch and most of those impacted by this were in fact doing just fine.
Google told us in an Google AdWords Help thread that the issue was resolved. But today, I spotted a thread at another Google AdWords Help thread with a sharp increase in complaints from advertisers about a sudden drop in the quality score.
What is weird is that Google AdWords representative, Bindu, said "Thank you all for bringing this up, what you are describing is a known technical issue referenced by my colleague, AdWordsPro in the forum link below." What she linked to what the thread where Google said the issue was resolved.
I guess the issue was not resolved? I am not sure.
But if you noticed a recent and major drop in your Quality Score - I'd complain in that thread.
Forum discussion at Google AdWords Help.
Update: Okay, Google confirmed this is a different bug and they are fixing it. Google said in the thread:
Please disregard my colleague Bindu's post earlier in this thread, in which she mistakenly referred to the issue that occurred in October.
It is understood that what is being described here is what appears to be a similar but separate issue that folks started seeing on Friday evening, November 19th.
Engineering is taking a look into this, as a priority - and I will report back in this thread when I know more.
In the meantime, my apology for the inconvenience and upset this issue has caused you.