Change the stream description
Note: This feature can only be controlled by organization administrators.
Follow the following steps to change the description of any stream in your organization.
If you wish to see streams that you aren't subscribed to, click on the All streams tab; the tab will turn gray upon doing so.
Click on the stream that you want to change the description of; the right side of the Streams page, labeled Stream settings, will now display the selected stream's settings.
After making sure that your cursor is hovering over the Streams Settings section, scroll down to the Administrator settings section. This section shows all stream settings that can be modified by an organization administrator.
To make a public stream private, input the new stream description in the field to the left of the Change stream description button. Click the Change stream description button to save your changes.