That's good news that no one else is using them. Let them absorb all those impressions.
I "stole" the idea from a post by current moderator eWhisper:
[webmasterworld.com...]
and what a difference it made for some AdGroups.
I used to advertise the exact title of an artistic work or product model as keywords and they would get 3000 impressions and 3 clicks after 2 days and of course, get disabled. Completely different behavior than my other kws.
Then I added the special search operators globally and now exact titles, etc. can hold their own as keywords.
The post cited has a whole bunch of good ideas, though some may not be good at the campaign level.
In my case, I always include
-free
-download
also.
patient2all
[google.com...]
patient2all
These searches:
allinurl:mortgage
allintitle:credit
allinanchor:debt
etc -- all bring up ads for money terms.
If someone is using those operators, they're not your target audience. Therefore, save yourself some impressions and get a higher CTR by eliminating these searches.
It only takes making a list like this once to be useful. A simple cut and paste at the campaign negative level takes 10 seconds, and will increase your CTR.
In many areas, especially SEO heavy ones, it can make quite a bit of difference.
What I found early on was that if I used exact product models as keywords 'rca super widget rc2889-af', I'd get tons of impressions, but didn't know why. Figured at first, potential buyers must be pasting these in since the odds of the average person entering that as an exact match was slim.
Didn't realize these impressions (sans clicks) were coming from competitors testing the waters, no doubt using such operators! Now that they're at my campaign level -keyword list, I get a reasonable amount of impressions to clicks for such terms (except since June 16th $#!@*).
patient2all
Here's a general list of negative keywords. What others do you use?
Another good way to find negative keywords is to search on Google for your actual keywords, and then 'shop' in the first 50 or so search results for negatives - in other words, usages of your keywords that have nothing whatever to do with what you actually have to offer.
AWA