In popular music, a chart-topper is an extremely popular recording, identified by its inclusion in a ranked list—a chart—of top selling or otherwise judged most popular releases. Popular music is Music belonging to any of a number of musical styles that are accessible to the general public and are disseminated by one or more A chart or graph is a type of Information graphic, that represents tabular numeric data and/or functions. Chart-topper and related terms like No. 1 hit, top of the charts, chart hit, and so forth, are widely used in common conversation and in marketing, and loosely defined. In popular usage "marketing" is the promotion of products especially Advertising and Branding However in professional usage the term has a wider meaning of In North America, the weekly charts from trade publication Billboard magazine are most often referenced (quite often internationally, as well), particularly the Billboard Hot 100 singles and Billboard 200 album charts, although there are many other charts and sources. A trade journal is a Periodical, Magazine or Publication printed with the intention of Target marketing to a specific Industry or type See Billboard (Turkish magazine Billboard is a weekly American Magazine devoted to the Music industry The Billboard 200 is a ranking of the 200 highest-selling music albums and EPs in the United States, published weekly by Billboard Because of its value in promoting artists and releases, both directly to the consumer, and by encouraging exposure on radio, TV and through other media, chart positioning has long been a subject of scrutiny and controversy. A musician is a person who plays or writes Music. Musicians can be classified by their roles in creating or performing music An instrumentalist plays a Consumers refers to individuals or households that use goods and services generated within the economy. Radio is the transmission of signals by Modulation of electromagnetic waves with frequencies below those of visible Light. Television ( TV) is a widely used Telecommunication medium for sending ( Broadcasting) and receiving moving Images, either monochromatic "Popular press" redirects here note that the University of Wisconsin Press publishes under the imprint "The Popular Press" Chart compilation methodology and data sources vary, ranging from buzz charts based on opinions of various experts and tastemakers, to charts that reflect empirical data, like retail sales. Debt AIDS Trade in Africa (or DATA) is a Multinational non-government organization founded in January 2002 in London by U2 's Therefore, a chart-topper may be anything from an insiders' pick to a runaway seller. An insider is a member of any group of people of limited number and generally restricted access The term is also used similarly to some extent in video games. A video game is a Game that involves interaction with a User interface to generate visual feedback on a video device.