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Difference between Analytics and AdSense

Changed to a new layout - stats are very different

         

jetteroheller

8:47 pm on Dec 13, 2008 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member Top Contributors Of The Month



I just compare the Analytics and AdSense data of a site,
where I changed November 29th the layout to my new design.
The average number of impressions from

November 1...November 28 is compared with
November 29..December 12

Google AdSense: 10,6% more impresssions
Google Anayltics: 11,3% less page views

This difference is not to explain for me.
Both systems just tell the opposit

AdSense tells me great new design, You have 10% more impressions
Analytics tells me terrible new design, You have 10% less impressions

Now I compare a domain changed November 13th to the new layout
In this case, I compare

October 1....November 12
November 13...December 12

Google AdSense: 11,2% more impressions
Google Anayltics: 4% less impressions

jetteroheller

9:51 am on Dec 20, 2008 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member Top Contributors Of The Month



The time span between

visitor sees content and
Google Analytics script loaded and working

makes a big difference.

Most common layouts load css and javascript in the head part.

This blocks rendering the page until all css and javascript are loaded.

So the visitor sees the first content nearly at the same time as also the Google Analytics script is loaded.

I have now a new layout designed for fast rendering the content.

At a large test domain, I have the first generation of the new layout
since November 29th

javascript loading only at the end of the html page.

A new generation is online since December 17th

Compact CSS inline coded, no loading of an external file.

When an usual TCP/IP package is 8 kB long, the browser can start to render the content with the first received package.

This makes the time between visitor sees content and Google Analytics script loaded much longer.

Here some statistics about it

2008-11-01 .. 2008-11-28

99384 AdSense channel about an AdLink
103216 Google Analytics

103,86% Analytics compared to AdSense channel

2008-11-29 .. 2008-12-19

82727 AdSense channel about an AdLink
69061 Google Analytics

83,48% Analytics compared to AdSense channel

2008-12-18 .. 2008-12-19 (inline CSS)

7405 AdSense channel about an AdLink
5614 Google Analytics

75,81% Analytics compared to AdSense channel

When the visitor sees the content, he has enough time to click on a link, before Google Analytics is loaded