You can share a collection (including a smart collection) that you create within Brand Portal. You can also share a collection that has been published to Brand Portal from AEM Assets. To share the collection with non-administrator users, use the Collection Settings dialog.
In the Collection Settings dialog, add the user(s) for whom you want to publish the collection and then click/tap Save. When selecting a role for a user or group, align the role with the global role of the user/group. An global editor should be assigned the role of Editor for the collection. In contrast, a viewer should only be assigned the Viewer role for the collection.
As a Brand Portal administrator, you can unshare collections that you previously shared with non-administrator users using the Share Settings dialog.