Why some results in SERP have a www. and some don't

[digitalops]

Hello all,

If this is posted twice, I didn't mean for it to be - but it looks like last time I tried to post this question it didn't post. This is my question:

How come some results on Google's SERP page are shown with a "www" and some are not? Does this effect SEO at all? I am including a screen shot so you can see what I mean. The Geary Interactive result has a "www" in front of while ingenexdigital doesn't.

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[TimKelsey]

Hi Adam,

It's based on the preference of the webmaster of those domains. They have simply chosen whether or not to include www in their domain. It doesn't have an effect on SEO because the addition or exclusion of www doesn't give search engines any clue as to the quality of the site.

The important thing to remember here is that http://www.example.com and http://example.com are technically different domains, so if you're not careful, it's easy to run into duplicate content issues. If you're working on this for your own website, you should pick one version and make sure the other redirects to it.

Hope this helps!

Tim