I did put [abcd] keyword on adwords and I see at the end of the day 2000 impressions
Is there an impression everytime someone types the [adbcd] keyword on google or when you do next to go to page 2 or 3 in the search results is it still considered as an impression ?
also something bizzard I noticed if I put 10 cents a click I get 10 impressions a day for a particual keyword and if I put 50 cent a click i suddenly get for the same the keyword 150 impressions ( it seems to me that there is a minimum google wants you to put to make sure they do the real number of impressions ?
I would say that impressions are 'counted' rather than 'calculated' which to me, at least, implies that some formula is at work.
Impressions are counted when the ad is seen. So, if your ad would have appeared on the third page of results but the user only looked at the first and second page - then no impression is counted.
Sometimes raising ones Max CPC can result in more impressions if it makes the difference between showing on the second page and showing on first page. This is because more folks look at the first page, than both the first and second.
Ordinarily, though, it is the Daily Budget that most influences the number of impressions.