You need to register your trade mark when you have a brand, such as the name of a product or a service, to protect. Registering your trademark offers you the ability to communicate that your brand is protected by using the ® symbol next to your brand and to take legal action against counterfeiters or any person or business entity using your brand without your permission. By registering your trademark, you are also able to sell or license your brand if you decide to do so.