Google Music service was first introduced by Google in May at Google I/O, it's still just a Beta format.
The launch of Google Music by Google already included with the package Music Store.
Google Music is meant by Google to compete with iTunes and Amazon in the market for cloud-based services to music. Just like iTunes Match and Amazon Cloud Player, Google Music allows users to purchase and upload other files to the cloud.
In addition, Google Music Store is now available in Android Market. Google Music will also be available on the Android Market application in the coming days. To access the Music Store Google takes Android OS 2.2 (Froyo) or above.
Google also announced that the web version of Google Music service is also compatible for all browsers, including iOS.
