Impact of Non SEO Subdomains
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My company has several subdomains whose specific purpose is to act as a landing page/site for our paid search and/or email program.
One of the things I've noticed on these subdomains is that they are not being excluded from the SEObots.
Could the lack of proper SEO techniques on these subdomains impact our main www subdomain?
What is the proper configuration we should use to make sure these sites are not considered for SEO?
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It is _possible _that a subdomain-based landing page could be cannibalizing rankings for specific terms from another page on your site. But if that landing page is actually that good for the term, its not necessarily a bad thing to have it ranking. If its ranking better than the pages you optimized for organic then maybe you should look at why that is (i.e. is it getting good/better links, are people sharing it around, is it better targeted than the organic page, is it more intuitive or has a better call to action, etc. etc.).
Now, if you really don't want thoe pages to rank in organic in place of optimized pages you created then you can very easily add a NoIndex tag to the page or exclude it from being crawled in Robots.txt
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I am wondering what exactly you mean by "not considered for SEO"?
For many purposes, subdomains are considered as independent domains. If they are excellent landing pages for a specific search, I see no reason to exclude them from appearing in organic search; else a noindex might be wise. But I cannot really imagine a good page deserving that, assuming linking to your regular page and no cannibalisation.
In general I would slap on the basics - proper description, title, maybe social media data and be done with it unless I have a really good reason to assume they are actively harmful somehow.
Regards
Nico
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