One thing that has always bugged me about Google Adwords is that if you wanted to temporarily stop one or more keywords or ad variations the only way to do it was to delete them, well now in response to feedback they can be simply paused here is how they announced it on their blog last Thursday:
Pause your keywords, sites and ad creatives
Have you ever needed to pause certain ads and keywords when your inventory was low? Or have you ever wished you could temporarily stop serving image ads on certain sites during the weekdays?
As of today, all AdWords advertisers can pause and resume keywords (for keyword-targeted campaigns), sites (for site-targeted campaigns), and ad creatives. As you can see from the picture below, this feature is functionally similar to the pause/resume feature on the Campaign Summary page – we’ve simply extended it to the keyword, sites and ad variations tabs.