There is a new Keyword Diagnosis option in the Keywords tab in AdWords. This can give advertisers detailed diagnostic info for multiple keywords at a time.

"Whether you have ten keywords or ten thousand, making sure your ads are showing is a top priority," says Miles Johnson of Google's Inside AdWords crew.

To use the feature, simply select "Diagnose keywords" from the "More actions" menu on the Keywords tab:

"After clicking 'Run test,' you'll see the real-time results appear in the Status column next to each keyword," explains Johnson. "If all is well, you see 'Ad showing.' If not, you'll see a brief summary of the problem (for example, 'Low bid or quality score')."

Users can hover over speech bubble icons to get more details on the status of any keyword. You may find more info on quality score issues, for example.