The search engine giant also announced about partnerships with more than 1,000 independent recording studios including EMI, Sony Music Entertainment and Universal for providing content to create the library of Google music with 13 million songs. Meanwhile, Warner music is not with the Google Music.

Users can add up to 20,000 songs to Google Music free of charge. Through the desktop application called Music Manager, users can upload iTunes and Windows Media Player library, playlists, playcounts, ratings, etc. For the Android users, free and purchased music is automatically saved to their Google Music library, and there is no storage limit.

Users will need the latest version of the Google Music app to play music library to listen the music on the Android device. iPhone or iPad users can use mobile web browser to access Google Music. On the Google+ social network users can share purchased songs with friends.

With the launch of Google Music, the company has to compete with Apple and Amazon. According to USA Today, the three digital powerhouses will be fighting it out for a slice of the $6.8 billion online music sales business by 2012 - as projected research firm Gartner.

Apple, who launched iTune of service in 2003, is the dominating the market. However, Google users can store music free of charge and the Apple users have to pay $25 a year. But, Apple has agreements with all four of the major U.S. music labels to reached iTunes distribution.