The Update came up today on the google play store for the new features of the Facebook Messenger here are some of the added new features

What’s New in Version 2.3
Updates to group conversations
- Name a group right from the top of your conversation
- Get to your group conversations in one tap – just swipe left to see them in your sidebar
- Search for group conversations by name or look them up by friends in the group
Other Updates
- Call friends for free right from Messenger (Canada)*
- Other improvements and bug fixes
*Free calling uses your existing data plan.

So, I checked out and test it out on my friends and here are some of the screenshots which is I think really cool feature

if you click the Icon on the upper right corner you will now have this feature where you can rename  your group conversation

you also have a button where you can leave a conversation right on your mobile

renaming the group conversation

you can also add photo’s for the group conversation by clicking the thumbnail

here you can choose which of your available friends you want to add on the group conversation

this feature is really a great update for mobile on the go so you can still connect and have a conversation withyour friends while you are not on your laptop of desktop.