Microsoft has decided to make Windows 8 a central hub for your online social activities and networks.
Hence, Windows 8 comes with a bundle of apps. People app brings your social networks under one roof. Mail collects all your mail services at one place.
Similarly, Photos collects photos from desktop and online services like Facebook, Flickr, etc.
It is but natural that Windows 8 includes an app in order to centralize one of the most prevalent online activities – chatting. The Messaging app covers that part of online social world.
In order to start using the app, you just need to add your chat account to it. Currently, Messaging supports two services – Facebook and MSN. However, the app is still in preview stage, and is likely to garner support for other services like Google Talk, Yahoo!, etc., by the time Windows 8 launches.
Following the design principles of Windows 8 apps, Messaging works in conjunction with the People app.
In fact, it gels so well with People app that you don’t need to add an account to Messaging app if you have already added it to People app.
Further, Messaging app fetches contacts from People app in order to start a conversation.