In this second part of a two-part tutorial, developers learned how to use the Twilio Sync Javascript SDK to incorporate real-time multiplayer functionality in the Tic Tac Toe game. They created a server capable of managing game rooms and generating Twilio Sync access tokens, and then added the Twilio Javascript SDK to the game and implemented the multiplayer functionality. The developers used the Twilio Sync client to update the game state in real-time, allowing multiple players to join and leave rooms simultaneously.