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I have a UK site and its been hit hard. 90 percent of my top listing pages have been thrown back by 6 or 7 pages.
FWIW I think that what we are seeing is a new update cycle. Things settled down last week, then I saw one DC change then that started to spread, eventually hitting all DCs.
Then this morning <using an online tool> there was a new set of relatively minor changes but a few much bigger changes on .co.uk. There are clearly two different sets of data being served to .co.uk or they are split testing a new geo filter.
I would sit tight for a while, it might well be that you come back as things settle. Is your traffic suffering? Maybe other folks are seeing your old positions.
[edited by: tedster at 3:54 pm (utc) on April 22, 2008]
And yet: I'm still ranking very competitively for most of my key phrases, I haven't done anything under the table, adding new content every day, lots of nice links coming ing (.edu, .gov, etc.). Some of the really awful sites that weren't much of a competition to me on my most competitive phrases are now ranking above me - and they are really, really awful. Like embarrassing awful.
So I don't know what's going on, I've read this entire thread (18 pages worth, oy vey), and I guess the consensus is to just sit it out and wait? Because honestly, I think I've got the worst case scenario over here for a site that has been number one for extremely competitive phrases for almost five years, and traffic has decided to take an extended vacation.
I don't know if Dewey is the cause because on April 19th our server was down for 24 hours (it was responding only HTTP Status-Code 500).
I would like to ask high skilled webmasters to help me to tell whether it is Dewey or something else.
I have dropped out from SERPs for 70% of my key phrases.
15% of my key phrases dropped by 8 - 12 positions in SERPs
The rest is keeping its position in SERPs.
Almost whole website IS in Google index.
The results on there look like Florida all over again. For our top $ two word and 3 word terms there's a bit of shuffling amongst our competitors in the top 10, but we are completely gone. On other DCs we are #8 for the 2 word term and #2 & inset 3 for the 3 word term. In each case our index page is either the only or first of our listings. The terms have the same term in them. Like widget services and big widget services.
On this DC the first place I can find us is at #115 and the index page is not listed.
We are completely unaffected for other terms that we target and retain our #1 slot for these but in each case the index page has never been the ranking page.
When I do a site: search the index page/root is not in the Google index.
Last week I did a 301 redirect of index.html to / ,following instructions posted by very senior members of this forum, in order to address a problem on Yahoo (which thinks we have two sub domains). I have removed this redirect now in case this is what has caused our problem.
It would be useful to know if others are seeing differences on this DC so I have a better handle on if I've shot myself in the foot or am caught in a new algo twist.
Positions down <in a competitive market area>,.. OK seen that before and recovered.
What really worries me is the email conversion rate and also the adsense CPR% have fallen through the floor indicating that searchers are not finding relevance in the SERPS. That is very frustrating.
I have also noticed a very large increase in SPAM emails since this update happened.
Looks bad for me and I would say it looks bad for Google.
[edited by: Robert_Charlton at 6:15 am (utc) on April 25, 2008]
[edit reason] removed specific [/edit]
I have just lost a first page position over the last week or so. I presumed it was regarding the recent algo changes, that is or is not happening depending on who you speak to.
However I noticed I had gained 60 pages when I actioned the site command.
These pages were listed, but these pages no longer exist because I had removed them via sitemaps and off my server, months ago, they just became 404s.
It was when I removed these pages moths agao i got my "first page" ranking.(cleaned up the site)
Checking on sitemaps now, I noticed that these urls were still classed as removed by sitemaps.
I checked my robots txt file, (that needed to be in place for google to remove these pages), and this is OK also.
So to me this means two things.
My pages are attempting to come back and the robots file and sitemaps are being ignored. (Maybe because an external site is linking to them)
Google has backdated the results and showing things as they were say 4 months ago. Or showing an old, out of date data center.
[edited by: tedster at 2:04 am (utc) on April 25, 2008]
Has any one notice a decrease of crawl rate reported in Google Webmaster for the last days of April that can be relate to this Dewey effect?
Just wanted to check if this something others are seeing before I start digging around my sites.
I got a lot of grey- and black-hat technique-sites which came up during the update. So should we go back to the good old blog-spam to get a good ranking?
I don't know if this is important, but searching for a keyword like "k´┐Żyword" (which is misspelled) gives me almost the old SERPs before the update.
Puts me back to #1 for the term I've had problems with but no change on the terms where I'm #1 now anyway. This adds weight to the theory that they implemented a phrase based algo on a list of commercial phrases.
Odd how its the big $ adwords phrases that are affected. Must be just a coincidence, they wouldn't peek at what terms advertisers think are worth spending big on and target those with a new algo. I know that the data is available to them but we have to trust good old Google that, tempting as it is, the data is safe in their hands and they wouldn't do anything that would increase Adwords income ;)
Hope this helps.