Save and pin messages
You have two ways to flag a post to make it easy to find later: saving messages and pinning messages.
Saving a message saves it for only you.
Pinning a message flags it for an entire channel.
Save messages
Save messages for later follow up by selecting the Save icon next to a message.

Pin messages
All members of a channel can pin important or useful messages to that channel. The list of pinned messages is visible to all channel members. There is no limit to the number of pinned posts in a channel.
Mouse over the message that you want to pin. The […] link appears.
Select […] > Pin to channel
Pinned messages are marked with the pinned icon. For example:
