Announced at E3 2011, it features social tools, feeds and player stats. Battlelog also lets users manage their friends lists, form squads, create platoons, use rudimentary voice chat and follow their friends' progress in real-time, and engage in forums. In addition to its social features Battlelog also functions as the Game Launcher and Server Browser to join online multiplayer games on the PC, replacing the built-in and secondary systems (such as Steam) found with games elsewhere.
It was heavly updated on June 4th to help promote Battlefield Premium. Some of the new features included access to all Premium unlock, easier access to Co-Op and multiplayer stats, assignments, leaderboards, unlocks, etc.
In Battlefield 3 for PC, the only key of getting through the Multi-player games is by logging an Origin/EA account into the Battlelog's website, from there, the player can modify his character, weapons sets, and most importantly, join online games. (Multi-player feature is not available from the game menu (PC version only), hence, the user needs to access the site in order to play the different modes)