Often you might come across an unethical domainer, who would attempt to sell off domains that were banned by Google. Yes, you read it correctly – a domain banned by Google.
Often webmasters might conduct in a manner that infringe on certain rules set by
Google, for instance spamming, link farming, cloaking, selling pagerank,
creating doorway pages, etc. Google ban these domains from Google search results
as well as from Adsense programs.
It is a known fact that Google is the single largest search engine responsible for at least 60% of all search engine traffic to a website. This means, in fact, that these domains will not receive this amount of traffic from Google. Furthermore, these domain names and websites cannot be monetized by Google Adsense.
In short, these types of domain names are worthless and should not be acquired.
There are tools available, which domainers can use to check whether a domain was banned from Google. We recommend the following two tools:
http://www.iwebtool.com/google_banned
and
http://www.selfseo.com/google_ban_tool.php
Both tools conduct the same service, but we list both in case one or the other might be out of service in future.
Ensure that you use these tools and do not end up acquiring a domain you will
have no resell value for.