Here's another thing Google won't tell you - there's no harm in leaving the terms inactive, because they *might* go active again on their own, specially if they have a Great or OK quality score. (If it's Poor, they probably won't) There are only three choices for QS, by the way - Great, OK and Poor. Google may have different indicators that they use internally, but that's all they'll show us.
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So I had a campaign that I started a while ago that had gone almost totally poor. I actually had activated it before I had the domains properly optimized and ready to go. Maybe 42 ad groups, with eight keywords in each - four for blue widgets, and four for red. It worked great for about ten days, and then got socked with $1.00 minimum scores all the way around. So I just left it there and went on to work on other things, including improving the landing pages and adding some more content to them.
Last night I went back and took a good look at what I had. I figured that even thought the QS was listed as Poor, I probably wasn't past the point of recovery, because the minimum bids were mostly $1.00 instead of $5.00 and $10.00. I was already bidding $.75 anyway. But I didn't want to pay a dollar.
So the first thing I did was to make 42 MORE ad groups, for the blue widgets, so I had a total of 84 - 42 for blue widgets, and 42 for red widgets. Now, this sounds like a lot of work, I know, but with the AdWords Editor (if you're doing AdWords, you really NEED this tool) it really didn't take too long at all - just copy, paste and edit.
So in the original ad groups, I left the red widgets, and I changed the ad, and made it more red widget specific.
In the blue widget group, I left the original ad running.
Miraculously, this seemed to reset all my Quality Scores to ok and great - even the poor ones! I don't know that it will last till the next time the bots come by, but for right now, I got a do-over. This is great, because my ads are better, my landing pages are better, and my ad groups are more tightly focused, so I have a better chance of keeping more of my keywords running at the CPCs I want to pay.
Your mileage may vary. But if you're having problems keeping an AdWords campaign going, you might give it a try.