User lists are a simple way to add a group of people to a space or bring them into a discussion on a thread.
Since it can be hard to keep everyone on the same page as teams grow, user lists are designed to help add a group of people to any discussion. This allows teams to continue to share, discuss, and make decisions effectively and inclusively no matter their size.
Anyone in your organization can create a user list, and anyone can view and join them.
You can add any user list in your organization to a space or thread to automatically notify everyone on the user list.