Let’s answer some serious questions:
1. What’s a “supplemental result?”
The official answer can be found here.
The main idea is that it’s wrong to have supplemental pages (also known as Google Hell) and this will damage your site’s visibility and rankings in the search engine.
2. How can I find out how many supplemental pages I have?
Simple:
do a google search for this term:
site:www.yoursite.com *** -sljktf
Don’t get fooled by the small numbers… repeat the search with the omitted results included.
3. How to get out of supplemental results?
Clean Your Blog Sidebar (Remove all the unnecessary and duplicate content from the sidebar)
Remove Duplicate Content (Remove your site duplicate content the easy way)
Don’t publish a post in more than one category (Duplicate content penalization )
In my case, 90% of my supplemental results were the automatic translated pages.
I’ve removed the plugin and got 404 on all those pages.
Got to Google Webmaster Tools and removed manually all those 250 pages.
(they say it takes at least 180 days to get out of the index.. but as you can see they already removed 120 pages in two weeks)
Use the More tag on every post (Again to avoid duplicate content. The post will appear one again in the main page.)
This are the steps that I’ve taken and I’ve got rid of 50% of my supplemental results and I can already see a growth in the search engine traffic.
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Published by June 5th, 2007 in Seo.
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June 6th, 2007 at 10:50 pm
An other great way to get rid of some of supplementals is to create a good robots.txt and restrict access for google bot to feeds and other pages where the content is duplicate.
June 6th, 2007 at 10:51 pm
Yes Alex
It’s all here.
June 6th, 2007 at 11:01 pm
Thanks, I didn’t noticed that post…
June 7th, 2007 at 12:31 pm
I have tried what you said, Mr. Cucirca. If it doesn’t work, I know where to find you… Kidding… Not.
June 7th, 2007 at 12:36 pm
I have tried following his advices also, unfortunately I don’t know where to find him
June 7th, 2007 at 12:39 pm
I’m not cheap, but I guess you can afford to buy information for me in this matter. Co-nationals special price ;).
June 7th, 2007 at 12:43 pm
Nice one Crispy, I guess in our days everything is for sale…
June 9th, 2007 at 9:41 pm
Cool!
o.o O.o o.O O.O
=P
=D
=(
>=(
>=)
=|
=/
=\
(Sorry, just wanted to see more of those cool smilies)
June 9th, 2007 at 9:42 pm
Aww they don’t show in my comment =(
Oh, oops
:p
>:(
>:)
:\
:/
June 10th, 2007 at 11:52 am
No kidding?
Maybe the author of the blog will install a smillies plugin just for you to play with it. 
June 17th, 2007 at 4:53 pm
duplicate content is not the only cause of getting your pages listed as supplemental. If you have a new site and your site has low PR, you can revise your content all you want, but you won’t get out of the supplemental index.
September 6th, 2007 at 8:48 am
You’re so full of shit Cucirca when i search your site for supplemental results i get 6 results and then i hit “repeat the search with the omitted results included.” surprise you have 242 supplemental results of 244 articles you have, you’re such a lier.
No more reading on you’re website, by bye. You’re articles are out of date.
March 13th, 2008 at 8:19 pm
VERY INTERESTING.
March 13th, 2008 at 8:20 pm
I WILL HAVE SEE WHAT MY BLOG IS LIKE OR SHOULD I SAY THE SITE I VOLUNTEER FOR.