Sometimes we see our QS of a popular keyword in the adgroup (which brings the most impressions and which has the most advertiser competition level) changes. It usually 7 over 10 but sometimes it becomes 9 over 10. And then it turns back to 7 over 10 again. It goes like this.
The reason why the QS fluctuates is the advertiser competition, a dynamic system with the auction, right? So my question is can we stabilize this QS at some point? If yes, what's your suggestion? Please don't tell me optimize or something like that because the campaign has been already optimized and still it is.
Thanks.
So all you have control over, really, is your own optimization - and if you think you've done everything you can, then you better get used to the roller coaster. Personally, I don't think there is such a thing as a perfectly optimized campaign, and there's *always* going to be something I can be doing better. That's why you test, and try new things. And test more.