The essential function of a trademark is to exclusively identify the source or origin of products or services, so a trademark, properly called, indicates source or serves as a badge of origin. In other words, trademarks serve to identify a particular entity as the source of goods or services. The use of a trademark in this way is known as trademark use. Certain exclusive rights attach to a registered mark.
Trademarks are used not only by businesses but also by non commercial organizations and religions to protect their identity and goodwill associated with their name.
Trademark rights generally arise out of the use of, or to maintain exclusive rights over, that sign in relation to certain products or services, assuming there are no other trademark objections.
Different goods and services have been classified by the International (Nice) Classification of Goods and Services into 45 Trademark Classes (1 to 34 cover goods, and 35 to 45 cover services). The idea behind this system is to specify and limit the extension of the intellectual property right by determining which goods or services are covered by the mark, and to unify classification systems around the world.