When a room (channel or discussion), whether with internal or external members, has concluded its purpose, it should be archived.
Examples of rooms that lived their purpose: Project that was completed; Partner/Customer that is no longer actively working with Rocket.Chat.
As a good practice, it’s important to share a message mentioning that the room will be archived before taking the action.
Steps to archive a channel:
1-Go to Channel/Discussion
2-Click on Room information
3-Click on Edit
4-Enable the “Archived” option and move it to the right
5-Confirm the archiving and save the proprieties.
Afterward, the room will still be accessible with a link but will be in a read-only state, and mentioning that it was archived.