The Billboard 200 is a record chart ranking the 200 most popular music albums and EPs in the United States. It is published weekly by Billboard magazine to convey the popularity of an artist or groups of artists. Sometimes, a recording act is remembered for its "number ones" that outperformed all other albums during at least one week. The chart grew from a weekly top 10 list in 1956 to become a top 200 list in May 1967, acquiring its existing name in March 1992. Its previous names include the Billboard Top LPs (1961β1972), Billboard Top LPs & Tape (1972β1984), Billboard Top 200 Albums (1984β1985), Billboard Top Pop Albums (1985β1991), and Billboard 200 Top Albums (1991β1992).
The chart is based mostly on salesβboth at retail and digital β of albums in the United States. The weekly sales period was Monday to Sunday when Nielsen started tracking sales in 1991, but since July 2015, the tracking week begins on Friday (to coincide with the Global Release Day of the music industry) and ends on Thursday. A new chart is published the following Tuesday, post dated to the Saturday of that week, four days later. The chart's streaming schedule is also tracked from Friday to Thursday. Digital downloads of albums are included in Billboard 200 tabulation. Albums that are not licensed for retail sale in the United States (yet purchased in the U.S. as imports) are not eligible to chart. A long-standing policy rendering titles that are sold exclusively by specific retail outlets (such as Walmart and Starbucks) ineligible for charting, was reversed on November 7, 2007, and took effect in the issue dated November 17, 2007.