Slack: How to Create or Join a Channel
Purpose: Slack channels are communication spaces that can be created and organized based on different topics or different groups of users in a workspace. Any Slack user in their designated workspace can create public or private channels. Public channels allows other users to locate and join them voluntarily, while private channels must have members invited to them by others already in that channel.
Channels in one workspace can only be joined by users within the same workspace the channel was created in. Users who wish to join channels outside their workspaces must be invited or the workspace administrators may need to enable outside sharing of that specific channel.
**Once a channel as been set to private, it cannot be set back to public. Please decide carefully before privatizing a channel.**