.BIZ is a generic top-level domain and comes from “business”. It was introduced as an alternative to the .com domain for businesses whose .com domain had already been registered. The .biz extension was created in 2001 which makes it a relatively new domain compared to the more common .COM and .NET.
Requirements for registration
The registration of the .biz domains does not have any requirements and can be used by anyone who wants the TLD for their website. However, it is expected that the domain will be used by a business organization. There are over 1 million domains registered with the .biz extension. If you would like to register one yourself you can do that from the following page here.