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subdomain or new domain better?

For SEO is it better to have a subdomain of a large site?

8:33 pm on Apr 21, 2010 (gmt 0)

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We have a large consumer-oriented site that gets 1.5 million uniques a month.

We're opening a sort of "companion" site.

Is it better to make it a subdomain of the original site (for search engines) or give it its own domain or both?

[edited by: Webwork at 8:38 pm (utc) on Apr 21, 2010]
[edit reason] Example.com is the only example domain we favor [/edit]

8:50 pm on Apr 21, 2010 (gmt 0)


WebmasterWorld Administrator webwork is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month

joined:June 2, 2003
votes: 92

Hi geekgirl. Since this is more an SEO issue than a domain issue I moved this over to the preferred location for SEO issues.

I'm not the expert but I'm going to kick this off by suggesting that "the" (an) answer - especially since your company appears open to a sub-domain solution - might be "neither" . . unless the solution is impossible to add-on via a sub-directory of the existing site. In other words go with adding the functionality via adding a directory versus a sub-domain.

From a link juice perspective the guidance I last understood was that search engines, to avoid "gaming by sub-domain", were treating subdomains essentially as "new" domains. That approach somewhat makes sense, especially where the "new (sub) domain" isn't quite within the theme/authority/trust of the original site.

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