page impression vs. ad unit impression.

too much difference between two sites

[guoqi]

I am not sure this is normal.

I have two sites. Site A, 1 year old. Site B, 4 months old. Both have two blocks of adsense there.

Site A: page impression: 2000/day, ad unit impression, 15,000/day
Site B: page impression: 15,000/day, ad unit impression, 16,000/day

They have so much difference in page impression, but almost has the same ad unit impression.

What can explain this?

[mack]

What script or application do you use for recording your page impressions?

Mack.

[webnoob]

my ad impressions never add up. i use different tools to track page views and theyre accurate.

example, my main page has 100,000 page views per day, i have one 468x60 and one 120x240 on this page.. yet google reports around 80,000 ad unit impressions.. what gives? there is a flaw somewhere with their tracking because it i should be getting pageview multiplied by 2 (two ads).. shouldnt it be that way? or is google cheating?

[edited by: webnoob at 5:06 pm (utc) on July 9, 2005]

[guoqi]

page impression and ad unit impression are reports from google adsense. In adsense you can select to view page impression or ad unit impression.