Action

What happens

Send a message in a channel

All members with access to the channel will be able to read your message in the conversation's Messages tab.

Send a message in a private channel

Only members who have been invited to the channel will be able to read your message in the conversation's Messages tab.

Send a DM to a member or a group of members

The member(s) will be notified.

Action

What happens

Pin an item to a channel or DM

All members with access to the conversation can see messages and files you or other members have pinned from the Pins tab at the top of the conversation.

Bookmark a link in a channel or DM

All members with access to the conversation can see links you or other members have bookmarked. Each link you bookmark is organized into a folder in the conversation header. 

Save an item from a channel or direct message

Only you can see messages and files you’ve saved.

Action

What happens

@mention someone in a channel

The member(s) will be notified.

@mention someone not in the channel

The member(s) won’t be notified, but you'll have the option to invite them to the channel or do nothing.

@mention someone not in a direct message

The member(s) won't be notified or allowed to join the conversation.

Action

What happens

Send a message with a hashtag and a public channel name
(e.g., #channel)

The channel’s name will appear linked in blue. All members with access to the channel can click its name to open it.

Send a message with a hashtag and private channel name
(e.g., #privatechannel)

The private channel’s name will appear linked in blue. Only members with access to the private channel can click its name to open it. People not in the channel will see an anonymous channel name.