Google's Big Daddy update - Is your site supplemental?
Google's latest update Big
Daddy continues to cause problems for some webmasters.
On the popular WebmasterWorld forum, many webmasters have
reported that all of their web pages except for their index
page have been moved to Google's supplemental index.
What are supplemental results?
Supplemental results in Google are from an alternate index.
Google usually only uses this index if they cannot find
relevant results in their normal index. That means that
this index is only used for very obscure queries.
Google augments results for difficult queries by searching
a supplemental collection of web pages. Results from this
index are marked in green as "Supplemental."
Being in the supplemental index generally means that your
web pages won't be included in the result pages for normal
How can you check if your web pages have gone supplemental?
Perform a Google search for site:mydomain.com (replace
mydomain.com with your own domain name). If you see "supplemental
result" next to the snippet then your web pages
Why does Google put so many web sites in the supplemental
It seems that this is simply a bug in the transition to
the new Google data centers. One of the main reasons for
Google's latest update was that Google wanted to solve
problems with canonical
It might be that Google makes some web sites supplemental
to identify the main domain of the site. Then Google might
respider these sites using the new algorithm that can better
handle canonical URLs.
What can you do if your web site is affected?
In the WebmasterWorld forums, a Google employee who posts
under the name Googleguy asked webmasters to send their feedback
"I'm happy to ask someone to check this out. Please
send an email to sesnyc06 [at] gmail.com with specific
domains and the keyword 'gonesupplemental'.
I have a theory about this, which I'm asking the crawl/index
guys to check out, but I'll need 5-10 specific examples
to check if my theory holds. If my guess is right, I'll
try to get the crawl/index folks to get things back to
the previous behavior."
You shouldn't worry too much if your web site has been moved
to Google's supplemental index. As soon as Google has rebuilt
the new index, your web pages should be back in Google's
If your web pages are still in the supplemental results
in a week or two, contact Google at the email address mentioned