Uploaded my first campaign yesterday. Greats across the board. Today, all ok's. How, Why, WTF. Seriously... its been maybe 12 hours. *Could* this have anything to do with my budget? It is set super low ($1.00) because I am having pixel tracking problems for the time being.
Most likely you just started a brand new account. And with most brand new accounts; you will get many "Great" quality scores. But as soon as Google reviews your landing page, they will assign the proper quality score. Which in your case was "Ok".
Brand new campaigns usually start off at great... Its googles way of starting your off and not penalizing you right off the start as long as you meet all their min requirements. If you see your QS going from great to OK then your account performance is slowly declining and eventually you will end up in poor. The issue at this point is poor text ads. You need to increase your CTR. Keep writing new ads and trying to outperform old stats If you leave things on autopilot you will eventually be turned off