We had quality score 7 and 8 for most of our core keywords. All of a sudden it dropped to 3 & 4. We didn't do any changes in the AdWords. The Ads are good performing Ads and it is there almost 3 years.
Normally a sudden drop is bad news. Hope yours recover. Little you can do..
1 = normally a human review by the LPQ team deciding they don't like your landing pages.
You need to wait a bit and check what happens to the QS scores. The problem is that Google seems to subjectively, retrospectively apply some new guideline to an old account and the poor advertiser has no clue.
Thanks Green_Grass. We are working on improving the CTR of our account.
To improve the CTR, we are
Tweaking the Ads and changing the landing pages content and monitoring the CTR. For non-performing keywords, if the search terms are irrelevant, then we are removing the keywords. Adding negative keywords (identified from the search terms)
No way to see historical QS. You have to run a QS report, say once a week which should be plenty, and save those reports. I put them into a database along with first page bid estimates. I figure this information could be useful in the future.