Most advertisers will find that there are many negative keywords that apply to their entire account. The more Campaigns you have the more time-consuming it is to add new negatives as you encounter them. The good news is that they can be added at the account level – but only by using the free Google AdWords Editor program.

There is currently no way to do this in their online interface. Although there are many entries for adding negative keywords in the Google AdWords Editor How-to Guide, as I write this they don’t include how to do this. These instructions assume that you have downloaded AdWords Editor and know how to pull your account data into it. If not, you can use the links above to do so. Once you have your account downloaded, here is the process:

1. Click on “Data” and select “Add multiple campaign negative keywords”. (The shortcut is Control/Shift/M.)
2. Paste your new negative keywords into the box.
3. In the Destination: Campaign drop-down box scroll all the way to the bottom and select “<All Campaigns> ”
4. Click “Next” and then “Finish”.

Note that the negative keywords are actually added at the Campaign level in every Campaign. You can also use this process to add or delete negative keywords only in specific ad groups or delete negative keywords from every campaign in your account.

Your changes are now in the AdWords Editor program but not in your account yet. Be sure to click “Post Changes” to upload them