Adword Ad Group Mystery Solved

I finally found out why one of my Ad groups wasn’t delivering ad impressions on my Site-based campaign (CPM). The answer was sent in an email from google adword support. The problem was that my adword destination URL had a typo. It was unreachable! It should have been www.farmout.ph but my typo made it wwww.farmout.ph

For a few weeks now, i was wondering why that particular Adword wasnt getting any page impressions. Could it be the usual suspects like Max CPC was lower than the other bids? Or that the budget for the Ad group was used up, or lower than the Max CPC? Or was it because the ad in question was being selectively filtered by the sites i choose?