However 4 impressions is too small number to be disabled. Check if you have used same keyword somewhere in the account which has been disabled on previous occassions because of low CTR.
Keywords are also disabled if they do not meet the Google guidelines.
Best way to find out is to mail the Adwords support center.
I'm sure this is a naive question but I'll take this opportunity to ask once again what etiquette or rule prevents the mention of one's business or keywords? (next time I see the word "widget" I'm going to scream :)! )
Also, what is the rationale for the etiquette/rule?
Marc
Did you make sure this keyword is not anywhere else in your account?
Yeah, this is really important. You may want to go on a 'search and delete' mission using the "Search my campaigns" tool near the top right of all 'Campaign Management' pages in your account. This'll show you all places that a keyword has been used, in the entire account.
Please note that it is important to delete a disabled keyword in every single place it exists, even if it is within paused or deleted campaigns or Ad Groups.
AWA
"Search my campaigns"
Hey AWA, on that note, i've noticed that the search function does not pick up or find the '-' character. This can make it difficult to manage things sometimes.