Here is the thing, you can use the yammer embed to allow for conversations to be had on yammer on an OpenGraph object. An OpenGraph object is nothing more then a “url” with some limited metadata. You could use this to comment on Corporate News via Yammer for instance.
The thing is, or was, you could NOT set a Yammer Group as a target for these conversations. This would all be posted in the All Company feed over at yammer. Until now. See the “announcement” here at stackexchange
“use “defaultGroupId” inside your config to get your group selected”
This is an example:
title: "Sharenomics Announcement" },
defaultGroupId: 948237, // this is new
footer: false }
Here is an implemented sample for my customer: