The Billboard 200 is a ranking of the 200 highest-selling music albums and EPs in the United States, published weekly by Billboard magazine. It is frequently used to convey the popularity of an artist or groups of artists. Often, a recording act will be remembered by its "number ones", those of their albums that outsold all others during at least one week.
The chart is based solely on sales (both at retail and digitally) in the United States. The sales tracking week begins on Monday and ends on Sunday. A new chart is published the following Thursday with an issue date of the following Saturday.
The Billboard 200 can be helpful to radio stations as an indication of the types of music listeners are interested in hearing. Retailers can also find it useful as a way to determine which recordings should be given the most prominent display in a store. Other outlets, such as airline music services, also employ the Billboard charts to determine their programming.
The chart omits unit sales for listed albums and total recorded sales, making it impossible to determine, for example, if the number one album this week sold as well as the number one from the same period in the prior year. It is also impossible to determine the relative success of albums on a single chart; there is no indication of whether the number one album sold thousands more copies than number fifty, or only dozens more. All music genres are combined, but there are separate Billboard charts for individual market segments. The complete sales data broken down by location is made available, but only in the form of separate SoundScan subscriptions. Declining CD sales and the widespread sale of singles via the internet further reduce the relevance of the Billboard 200.