You can access the default channels My Dashboards, My Network, and My Drives, as well as the channels you created, from the left pane.
When you open a channel from the My Channels section, you can see the following content:
Articles have different icons depending on their type:
Use the Publish feature to launch the Publish panel. For more information, see Publish an Article.
From this panel, you can share an article in a community or in a conversation.