5) Autoblogs and Machine-Generated Content
Yes, you can file this under thin or duplicate content, but the automation itself creates a red flag for Google. And the ability to buy cheap, effective autoblogging software has caused these sites to explode over the past two years. Just because you can do it doesn’t mean it’s a good idea for your site.
Anything that pulls in content from other sites, from blog posts, to press releases to directory information is risky. In addition to looking at the content, some affiliates suspect that Google looks for trails left by these autoblogging programs in your code. And if they see these trails, your site will be devalued, even if you’ve done light editing of the content you’re scraping. To get around this issue, the best thing to do is simply avoid machine generated content at all costs.