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Would there be any negative SEO effects for having a wordpress website at example.com and having another website at example.com/anothersite?

  1. Would the site "anothersite" be indexed in search engines (assuming I did all the seo strategies for them)?

  2. Any negative effects for either site?

Thanks in advance

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FYI, I edited your title and question to be more clear - what you're asking doesn't have anything to do with where the databases for your sites are. – tnorthcutt Sep 17 '10 at 17:12
Thanks, I apologize for the confusion – Jeff Sep 17 '10 at 22:15
up vote 1 down vote accepted
  1. Yes
  2. Whatever negative means to you. I tend to say not more then with a single site.

The search engine will basically spoken not differ between one or more sites. The spider is just indexing pages not sites. So this can have positive effects while the content of one site pulls / pushes the URLs of contents of the other one.

So the arrangement of the sites in URLs on that domain (URL Layout) and it's contents will have the SE influence, not the number of sites you run on the domain.

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Thanks for your time! – Jeff Sep 17 '10 at 22:17
  1. Yes.
  2. It depends.

From search engines point of view it would be one site. If content between two installations is grossly different that likely won't be efficient for combined site outlook.

I'd prefer site1.example.com and site2.example.com if hosting two different sites on same domain.

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Thank you very much for you answers, just what I was hoping to hear – Jeff Sep 17 '10 at 22:16
Just to add to Rarst's comments ... most search engines will index sub-folders as part of the same site. That's why systems installing multiple sites to one domain (i.e. WordPress.com, Blogger) use subdomains rather than sub-folders. Google doesn't see any difference between site.com/pageonsite and site.com/anothersite. – EAMann Sep 18 '10 at 15:34

What would be your reason for doing so?

Short answer - no it shouldn't have an adverse effect on SEO because it will be seen as a single site by a search engine. However there are several reasons why you wouldn't want to do this including

  1. SEO Reason - You won't be able to easily generate cross site sitemap files
  2. Headache Reason - You have to manage two versions of WP core, plugins, and template files
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protected by toscho Jul 12 '12 at 16:38

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