Why Google Banned Websites?

It's a simple question... Are you asking Google to penalize your website?
I'm sure you're probably thinking; Well, of course not! Yet daily I see new people complaining in search engine optimization forums that their websites have been banned by Google and they "have no idea why".
These people claim they've done nothing wrong and are absolutely clueless as to why their site is no longer in Google. The purpose of this article is to teach you one VERY important thing.
What NOT to do when optimizing your website, to make sure you don't get banned.

How do you know if you've been banned?

First let me show you how to see if you're clearly banned by Google. Often times people think they've been banned, when in reality they've just dropped in ranking and can't find their website.
There are a couple of things you can do.

• Check Google's search results.
• View the Google toolbar.

Check Google's search results

Go to Google and enter your entire URL into Google's search box. In this example we'll use a made up domain name. (www.jkhljkhkjh.com). On a side note, I tried www.somerandomdomain.com and www.fakedomainname.com and both were already taken. Apparently we've got some creative people out there... :-)
Anyway, we'll go to Google and enter our entire URL and click "search"
http://www.jkhljkhkjh.com
Notice that Google says there is no information available for this URL? This means that the URL is no longer in Google's database (a.k.a. index)