You can forward Conversations to other individuals in your courses.

Even when you are part of a group conversation, you can privately repond to another individual.

You can upload supplemental files as part of your Conversations messages.

You can view all unread messages in your Conversations Inbox. You can also filter messages to show only unread messages.

You can use Conversations to send a message to your entire class. Depending on how permissions are set, you may or may not have the ability to message the entire class.