Apple will officially enter the music streaming subscription market on Tuesday with the launch of Apple Music and its accompanying Beats 1 radio station. An estimated 41 million people paid for a streaming music subscription service in 2014, according to IFPI, a London-based recording industry trade group that represents more than 1,300 record labels. Apple's huge advantage: With more than 800 million iTunes accounts, Apple Music has the opportunity to quickly amass a following.

Source: Yahoo Music
Link: Apple Music: Everything You Need to Know About the Launch