1. some of my ads have avarage position < 1, usually something between 0.6 and 0.9. Looks strange, how is average position calculated?
2. one of my keywords had unbeliivably high number of impressions on the 2nd of October, usually it's less than 10 impressional daily. On the 2nd of Octobet the number of impresions was 1100+ The number of clicks was usual - 3 clicks. My CTR dropped from usual 25-35% to 0,2%
I would think this had something to do with the expanded broad matching feature announced I believe on the same day, and in such a case I'd expect my competitors to experience the same ctr drop. But on the 4th of October my average position for this keyword dropped from usual 0.8 -1.2 to 4.5 I do not believe this could be caused by the fact that all my competitors increased their max cpc at the same time. The only reason I can see is that ctr drop two days earlier. Then I do not understand how this ctr drop could affect my competitors' ads less than mine. And yes, the number of impressions was back to normal on the 3rd and 4th
So the questions are: did anybody see unusually high number of impressions on the 2nd (like 100 times more impr. than usual)? When cpc and position are calculated what ctr is taken into consideration? today's ctr? yesterday's ctr? last week's or last month's ctr?
as to the second question I think it has nothing to do with expanded broad matching and this thread explaines the situation very well
[webmasterworld.com...]
the only question left is 'when ctr drop would affect your cpc and position, same day, next day, in a week?' and 'how long the negative effect would last?'
