Enable Group Conversation?

So this new thing showed up in my text messages when I went to send a message to two people at once asking to enable a group conversation. It says I'll be charged for every message sent to each recipient at a normal rate and that every message will be sent as an MMS (I have free MMS messaging) so I was wondering if someone could shed some light on this new feature. I'm running BlackBerry 10.3.1.1115 or something like that.
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Posted via CB10

Some people get charged per sms message by their carrier (if they don't have unlimited texting on their plan)

SO:
Suppose your carrier charges you 15 cents per message. If you sent a group text to 2 people that text will cost you 30 cents (2x15) send it to a 3 person group & it will cost you 45 cents (3x45)

That's just what that message is saying

Posted via CB10

Ahhh okay thanks

Posted via CB10