Before the unified Play branding, Google had the Android Market, Google Music, and Google eBookstore. Google decided to merge and rebrand its individual digital offerings into the Play Store in March of 2012.
The Play Store is now the default place to purchase apps, movies & television, music, books, and news subscriptions for all Android devices. The latter four offerings having their individual Android and iOS apps to watch, listen, and read purchased content. Most content can also be accessed through the web.
In April of 2016, the suite of icons were redesigned in a similar style to provide a consistent look across all devices and the web.