Discussions are a great feature that we created to allow you to have contained conversations or streams of consciousness that don't clutter the rest of your class channel. These are breakout spaces that can be for specific topics, such as a video that you just showed in lecture or your online office hours.
It helps to give your students these breakout discussion rooms so that they can have a free-flowing conversation about one specific topic, and be able to revisit it whenever they need it.
Discussions also help keeps your channel organized. All discussions that you or your students have joined can be found on your left-hand bar, under "Discussions".
Discussions in your channel can automatically be seen and accessed by everyone in that channel, so you don't need to "invite" all of your students individually. A list of all the discussions in a channel can be found by clicking on the three dots in the upper right-hand corner of the channel and selecting "Discussions" from the drop-down menu.
See Creating a Discussion to get started!