How To Fix Soft 404 error?

Marketing
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How to fix 404 error on my website. google web master tools detect 13 soft 404. is it harmful for my website.

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[FONT=Verdana]Have you read the information at Google Webmaster Tools Help? It has some useful advice.

http://support.google.com/webmasters/bin/answer.py?hl=en&answer=181708[/FONT]

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