The two main reasons, you should upgrade your what’s app to the latest version are,
★You can now make group video call
The way the feature works is when you’re in a call with someone you can tap the add contact icon in the top right of the screen.
Then you will be able to choose between contacts to invite to the call. This works on both audio and video calls.
★Group admin can now choose to allow only admins to send messages to a group