Seo cheating: domain name bombing

Domain Name bombingDomain Spam

Seo beginners often think that registering N domain names is connected to the main site, so that the PR of the main site can be increased. If all the N domain names have their own websites, it will be okay. However, if all N domain names direct to the content of the main site, or there are only a few pages or even duplicate pages, this will be considered a Seo scam. For domain name bombing, the search engine's attitude is: delete these "sub-sites". In serious cases, the main site will also be punished.

From: http://www.seowhy.com/8_50_zh.html