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cpm cut in half.can't figure it out

changed url structure, that's all...

     
8:10 pm on Aug 9, 2007 (gmt 0)

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My CPM has been cut in half.

I changed my url structure from subdomain.site.com/keyword/ to site.com/subfolder/letternumber.

Everything else has remained the same.

CPM dropped immediately and has remained constant at about 50% of what it's been the past several years.

Any suggestions, other than going back?

Could it be due to the new url not having the same number of inbound links the old one had?

The new url still has pr greyed out, which scares me. It's indexed in google. A link: search shows no inbound links.

8:17 pm on Aug 9, 2007 (gmt 0)

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How long has it been since you changed everything?

Might take a bit to get all the adsense ducks to realign themselves on your site.

8:26 pm on Aug 9, 2007 (gmt 0)

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It's been my experience that AdSense does take into account the subfolder name when deciding which ads to serve. Your new structure might be causing it to serve less relevant ads. But if you give it some time, it will probably work itself out.
1:52 am on Aug 13, 2007 (gmt 0)

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It's been about 2 weeks now I guess.

The ads haven't changed. They are all still perfectly relevant to the pages they are on even without the name in the subfolder. The last couple of days have been even worse. It's making me crazy!

6:21 am on Aug 13, 2007 (gmt 0)

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Don't be so sure the ads have not changed. What you see is not always what everyone else sees. Particularly if you visit your site often.
7:57 am on Aug 13, 2007 (gmt 0)

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You're not the only one who's cpc is cut in half, have a look in this thread:

[webmasterworld.com...]

- Dirk

10:03 am on Aug 13, 2007 (gmt 0)

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I changed my url structure from subdomain.site.com/keyword/ to site.com/subfolder/letternumber.

To change from

site.com/subfolder/letternumber
to
subdomain.site.com/keyword

is a very good decision.

The opposit is a shut in the own knee.

10:04 am on Aug 13, 2007 (gmt 0)

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To change from

site.com/subfolder/letternumber
to
subdomain.site.com/keyword

is a very good decision.

Why?

8:05 pm on Aug 15, 2007 (gmt 0)

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can you please explain why you think one is a good decision and why my going the other way was a bad one?

Thanks.

9:36 pm on Aug 15, 2007 (gmt 0)

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1. You should make a 301 redirect to all your old urls to new one for transfering the page rank and reputation it build over the time.
2. If you don't transfer than these urls are considered as new pages and it will take time to build its own page rank.
3. The "/keyword/" folder was there in the url so it was helping in SEO, now that you don't have you loose something.
10:35 pm on Aug 15, 2007 (gmt 0)

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You're not the only one who's cpc is cut in half,

Shortbus1662 is talking about CPM (presumably meaning eCPM), not CPC (advertiser's cost per click) or EPC (publisher earnings per click). A decline in eCPM can be caused by a drop in either the average EPC or clickthrough rate (or, in some cases, both).

In Shortbus1662's specific case, it would be helpful to know whether EPC, CTR, or both are down. Knowing that much might help to shorten the list of possible causes, but we'd still be stuck with guesswork, because we wouldn't know why Shortbus1662 was seeing a decline in EPC, CTR, or both.