When Google switched to using the minimum bids instead of disabled keywords, there was still one leftover item that was not fully transparent: A keyword that did not receive an impression for 90 days became disabled behind the scenes even if it showed as active within your account.

It seems Google has clarified when this happens, and ads the caveat that the word will go active again if people start searching for it.

Overall, I’m a fan of the keyword analysis info boxes within AdWords. I find the various alerts useful for a quick diagnosis inside an account. However, they would be very useful if you could run a report and see all of these alerts at a single time instead of having to view them one-by-one.

• Handling Disabled AdWords Keywords
• Overture’s Click Index
• What is the minimum click through rate?
• What is Google AdWords Keyword Status?
• Don’t Search For Your Own Keywords Over & Over