Gyutae Park shares a few good tips that might help you avoid getting a Google penalty.
Google has a lot of information about you and your sites. Google runs the most popular contextual advertising platform, owns a free analytics package that’s better than most paid versions, has access to all WHOIS information and IP addresses, and can analyze sites that you interlink. Not only that, but Google has access to your email, documents, and browsing history. Sound scary? That’s what I thought.
If you can, it’s best to separate your sites as much as possible (e.g. different IP addresses, no interlinking, etc). Why? If Google suspects something about one of your sites, they’ll probably look into your network for other sites you’re involved with as well. That’s definitely not something you want.
From: Winning the Web
Related: Know Everything About a Website
Find this article at: http://digitalinspiration.com/avoiding-a-google-penalty
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