AdSense Dictionary regarding Advanced Reports

So, people who can help me (and others who don't understand this) please reply.

I'm logged in my AdSense account right now and I see:

Page impressions Clicks Page CTR Page eCPM [?] Earnings
243 XX X.XX% $XX.XX $XX.XX


Alright.

Now , I'm going to "Advanced Reports" and I choose to see the Today range

I sort the results first time by "Page" and I see the results that you can read them upper

Now, I'm choosing to see data by "Ad Unit"

Ad unit impressions Clicks Ad unit CTR Ad unit eCPM [?] Earnings
694 XX X.XX% $XX.XX $XX.XX


And finally I choose to see the data by "Individual Ad" and I have

Ad Impressions Clicks Ad CTR Ad eCPM [?] Earnings
2,565 XX X.XX% $XX.XX $XX.XX


Can someone tell me the difference in this results ? I admit, I didn't read a second the Google's dictionary about this , but maybe some of you might know to explain it more friendly then Google does.

Thanks

 

seems nobody wants to give me a hand

 

The page is the times the pages were shown.
The Ad unit impressions is the times individual ad-units were shown. Since you obviously have several units per page, this number is higher.
The Ad Impressions is the times individual ads were shown. Since there are usually 4 ads per ad unit, this number should be roughly four times the number of ad unit impressions.

 

thank you. good job