It can be a word, a logo or a combination of both.
Your trade mark can be your brand and can be your most valuable asset, so it needs proper protection. It is likely to be a prized marketing tool and enables customers to instantly recognise your services or products.
Registering a trade mark gives a business the exclusive right to use it in the territories that the business operates in (and the territories/countries for which you have applied for registration in) and enables a business to take action if a third party tries to use it.