The company plans to integrate the platform into the YouTube. Twitch is currently one of the most popular ways to wathc the games live. Viewers are offered an opportunity to comment the game in the integrated chat. The possibility of using the platform is provided directly from the consoles PlayStation 4 and Xbox One, so it is no wonder that Google decided to make a move.
Twitch currently has about 45 million monthly users. For comparison, YouTube has over one billion users per month.
[Ed – this is still not a confirmed item (from what we are seeing) and there has already been a backlash from the gaming community. The do not want to see Google in charge of this service. It seems they feel that Google might be capable of messing up something good... Personally I happen to agree]