A concert tour (or simply tour) is a series of concerts by an artist or group of artists in different cities, countries or locations. Often concert tours are named to differentiate different tours by the same artist and to associate a specific tour with a particular album or product. Especially in the popular music world, such tours can become large-scale enterprises that last for several months or even years, are seen by hundreds of thousands or millions of people, and bring in millions of dollars in ticket revenues. A performer who embarks on a concert tour is called a touring artist.
Different segments of longer concert tours are known as "legs". The different legs of a tour are denoted in different ways, dependent on the artist and type of tour, but the most common means of separating legs are dates (especially if there is a long break at some point), countries and/or continents, or different opening acts. In the largest concert tours it has become more common for different legs to employ separate touring production crews and equipment, local to each geographical region. Concert tours are often administered on the local level by concert promoters or by performing arts presenters. Usually, small concert tours are managed by a road manager whereas large concert tours are managed by a tour manager.