Does Google punish (in terms PR and SERP) for having subdomains?

Hello! everyone:

I would like to create a few subdomains, each using a different keyword as subdomian, each keyword is one of my products.

Question: does Google punish for having subdomains in this way?

Following is an extract from Google Webmaster guideline:

"Don't create multiple pages, subdomains, or domains with substantially duplicate content."

What does it mean?

Thanks very much

 

you can create any number of subdomains and folders or separate webpages, google is never going to punish you for that, but do not make them using duplicate content, you will definitely be punished

 

subdomains are fine as far as google is concerned

 

Thanks every one.

If in my subdomain page, I make a link to my main domain, and do a "nofollow tag, would this be acceptable?

Many thanks indeed

 

Even without the nofollow tag you should be doing fine if you have no duplicate content.

 

Many thanks to everyone!

 

It does not punish, until you use it for spamming forums, etc.

 

If the sub-domains serve a legitimate purpose and contain unique content I don't see what the problem is.

Treat a sub-domain exactly the same as you would a directory or folder.

Would you rel="nofollow" internal links from your /blog/ to your / directory? No, so there is no need to do it for a sub-domain either.

- Matt

 

Thanks for the information

 

The best example to follow for this is ebay. They dominate the SERPs with their subdomains. Just try a search for 'ebay' and you have hardly any other site in the first 5 pages