Re: How do you discontinue an adwords "campaign"?
Log into your account, go to the Campaigns tab, select the check boxes next to the campaigns you want to stop, then select either Pause or Delete from the Edit menu. (Either option will shut down active ad serving.)
It may take up to 48 hours for all of the outstanding performance data to be posted to the interface and the final cost figure to show.
Google AdWords Top Contributor