THE BILLBOARD 200.

The Billboard 200 is the list of the 200 best-selling new record albums and EPs in the United States, released every week by Billboard magazine. This is often used to convey popularity to one or more artists. The chart is mainly based on sales (both retail and digital) of US albums. Sales week originally started from Monday to Sunday, although since July 2015 it has been moved from Friday to Thursday. On the following Tuesday, a new chart is released that determines the sales data of the previous days. New products are always released on the American market on Fridays. On the Billboard 200 there is also the data of the digital downloads of the albums. Albums that are not licensed for retail in the United States (but purchased via import) are not eligible for the chart. As of December 13, 2014, Billboard updated their chart methodology, including streaming and digital on-demand sales. The site is divided into categories, for example you can see  the week, award, last week, peak wks on chart.