About the Blogger “Monetize” Tab

The Monetize tab in Blogger makes it easy to enable AdSense ads on your blog.  Once enabled, Blogger will retrieve your AdSense earnings data directly from AdSense so you do not need to go to AdSense to get basic earnings information.
AdSense Reports
After finishing your blog, you will be start earning when people click on the Ads which is shown in your blog.  The reports for earning includes a Drop-Down bar which shows Today, Yesterday, Last 7 days, This Month, Last Month, and All time.  If you select anyone from this will show the relevant report from the Google AdSense.
All Time
If you are using AdSense early before, you can notice that Blogger created a new channel with the URL of your Blog in your account.  If you have had AdSense ads on your Blog before using Blogger’s AdSense integration to insert ads into your blog, it is important to not that All Time will retrieve data only from the time you connected Blogger to your AdSense account.  This is no way affects your overall AdSense reporting, available directly from AdSense.
Terminology
The AdSense report visible from the Monetize tab contains basic information about how many ads have run on your blog, how many clicks were obtained by the visitors, and how much you have earned.  Each tem in the report is defined below:
Page Impression: The page impression is very important to generate every time a user views a page displaying Google Ads.  For instance, you have three ad units displaying in your page and it is viewed twice, you will get two page impressions and six ad unit impression.
Click: The reporting period which is given to the number of times an act unit was clicked.
Page Click Through Rate (CTR): The number of ad clicks divided by the number of impressions for the page of ads that appears when a link unit is clicked.
Page Effective Cost Per Thousand Impressions (eCPM): It is evaluated by dividing earnings by number of page impressions and multiplying.  This makes it easier to compare multiple sites to see which are performing better.