Standard channels are available to all team members in Teams. Most channels are standard channels. If you need a smaller, specific audience for a particular subject, you can use a private channel. Shared channels are for collaborating with people inside and outside your team or organization. 
In this topic:
 
Standard channels
	- 
	They’re open for all team members and anything posted is searchable by others. 
- 
	By default, all members of a team can create standard channels.  
- 
	You can't convert a standard channel to a private channel and vice versa. 
 
Private channels
	- 
	These are for discussions that shouldn’t be open to all team members, so you must be invited to join one to view it within a team. 
- 
	By default, any team owner or team member can create a private channel and add members. Guests can't create them. Your admin can change this permission and limit private channel creation to certain roles. 
- 
	Wikis, apps and bots, and scheduled channel meetings aren't supported at this time. 
- 
	You can't convert a private channel to a standard channel; when a private channel is created, it's linked to the parent team and can't be moved to a different team 
Files that you share in a channel (viewable on the Files tab) are stored in SharePoint. To learn more, see How SharePoint Online and OneDrive for Business interact with Teams.
Note: Files shared in a private channel are only viewable by the members of the channel and are stored in a separate SharePoint from the rest of the team's files.
Private channel meetings and calls
External guests can join a team's private channel meeting or Meet now call, but there are a few things to know.
	- 
	They're only able to participate if a member of the private channel sends them a link to join the meeting, or calls them during the meeting to meet now. 
- 
	During the meeting or call, they'll have temporary access to chat, files, whiteboard, notes, and the participants list (those not in the Outlook invite), but not after. 
 
Shared channels
	- 
	They're for collaborating with people inside and outside your team or organization.  
- 
	Only team owners can create shared channels, and only shared channel owners can add members or share the channel with a team. 
- 
	Only people who are owners or members of a shared channel can access it, so you must be invited to join one. 
- 
	You can't convert a shared channel into a standard or private channel and vice versa.