A service mark is a type of trademark used to identify a service rather than a product. It can consist of words, phrases, symbols, designs, or some combination of these elements. A service is something intangible provided for the benefit of another party, such as an activity performed for pay or otherwise. A service mark differs from a trademark in that it is used on the advertising of the service rather than on the packaging or delivery of the service, since there is generally no "package" to place the mark on. For example, a private carrier can paint its service mark on its vehicles, such as on planes or buses, and personal service providers can place their service marks on their delivery vehicles, such as on the trucks of plumbers or on moving vans. However, if the service deals with communications, it is possible to use a service mark consisting of a sound (a sound trademark) in the process of delivering the service. Obtaining a service mark in the United States makes it easier to obtain a service mark in foreign markets, and it also allows a business to create a specific brand identity, which is important in relaying to customers what the brand is about and the quality they can expect. A service mark protects intellectual property, and it can be registered with the U.S. Patent and Trademark Office by filing an application, paying the necessary fees, and awaiting approval.