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Alexa knows Your AdSense CTR
Surprised how precise the data are
jetteroheller




msg:4023925
 5:48 pm on Nov 12, 2009 (gmt 0)

Just looked up the info for my site in Alexa.com

There is "Clickstream" with upstream and downstream sites.

There is at the downstream sites Doubleclick.net

The percentage listed in Alexa is very close to my CTR at AdSense

I tried to test several other sites.

The online version of a big German newspaper - bild.de
showed the main adserver of this newspaper
3,77% smartadserver.de

 

IanCP




msg:4023954
 6:43 pm on Nov 12, 2009 (gmt 0)

I'm confused

sid786




msg:4023994
 7:41 pm on Nov 12, 2009 (gmt 0)

I agree with Iancp..

mack




msg:4024004
 7:47 pm on Nov 12, 2009 (gmt 0)

I think a lot of this will be based on alexa toolbar data. They will know how many users are running the bar, and they will know roughly how many peopel are using the web. From that they can work out what percentage of total users are running the bar.

So if there are only 10 internet users and 1 alexa bar user then 10% of the net is running the bar, so they know how to multiply their toolbar data to get a fairly acurate estimate of total usage.

Very random and small numbers in my example I know :)

Mack.

IanCP




msg:4024032
 8:21 pm on Nov 12, 2009 (gmt 0)

Alexa in my experience is useless and so far wide of the mark to be laughable.

alika




msg:4024040
 8:30 pm on Nov 12, 2009 (gmt 0)

Not all site profiles -- even those running Adsense, such as my sites -- show Doubleclick in either the upstream or downstream

OutdoorWebcams




msg:4024106
 10:15 pm on Nov 12, 2009 (gmt 0)

BTW, Alexa counts visits while AdSense counts page impressions.

So Alexa's 'CTR' * pageviews/visitor should match the AdSense CTR.

johnnie




msg:4024129
 10:53 pm on Nov 12, 2009 (gmt 0)

Oh, I only wish these data were accurate. I'd have a 100% CTR :D

IanCP




msg:4024131
 10:55 pm on Nov 12, 2009 (gmt 0)

Thought I'd check it out once again:

1. Traffic Rank a million miles away from directly measured Quantcast

2. Sites linking in approx 1.4% of actual real world.

3. "upstream or downstream" is a total nonsense. Downstream in particular includes XYZ affiliate programme with an astonishing 17.65%. A subsidiary company of Amazon.com can't determine that I send 5 - 10 X that affiliate traffic to Amazon compared to XYZ?

No mention of AdSense anywhere.

As I said:

Alexa in my experience is useless and so far wide of the mark to be laughable

Lame_Wolf




msg:4024176
 1:23 am on Nov 13, 2009 (gmt 0)

BTW, Alexa counts visits while AdSense counts page impressions.
So Alexa's 'CTR' * pageviews/visitor should match the AdSense CTR.

That's assuming you have adsense on all pages.
My site only has about 20% of it's pages with adsense on.
Anyway, I have never bothered with Alexa's data. Take it with a huge pinch of salt.

OutdoorWebcams




msg:4024269
 7:43 am on Nov 13, 2009 (gmt 0)

That's assuming you have adsense on all pages.

Sure. But even if you had AdSense on all pages a direct comparision of the two metrics would be nonsense.

Lame_Wolf




msg:4024284
 9:39 am on Nov 13, 2009 (gmt 0)

Sure. But even if you had AdSense on all pages a direct comparision of the two metrics would be nonsense.

Which is why I finished with..."I have never bothered with Alexa's data. Take it with a huge pinch of salt."

OutdoorWebcams




msg:4024372
 1:33 pm on Nov 13, 2009 (gmt 0)

You're right of course!

I just wanted to point out that even if Alexa's data were accurate, a comparision of Alexa's CTR and AsSense's CTR is like comparing the taste of beef and pork, because Alexa counts visits while AdSense counts page impressions.

jetteroheller




msg:4024379
 2:10 pm on Nov 13, 2009 (gmt 0)

Which is why I finished with..."I have never bothered with Alexa's data. Take it with a huge pinch of salt."

I had always much fun with Alexa data.

Last time, somebody claimed he will have next year 50.000 EUR pro month from advertising at his internet project.

His Alexa data showe about 5% of my current traffic.

So he wants a 500 times higher eCPM, because my 20 times higher traffic earns only little bit above 2000.-EUR a month.

Great was a request for SEO work.

I found that they claim huge visitor numbers at the contact info.

I answered the estimation for SEO work

"After a half year of hard work, we will reach the visitor numbers, You are claiming just right now on Your site"

I did not get the order, but the vistors numbers vanished from their site :)

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