What do the different Board icons mean?

  - A folder is a Board with no Cards. It is essentially a place-holder under which you can nest related Boards.

 - Your private Boards are Boards which only you can access.

- Another user’s private Board is a Board which you cannot access. You will only see this icon if you have access to a Board nested beneath another user’s private Board. You cannot open such a Board.

- A public Board is one which every user in the organization can access.

- A restricted public Board is one which only a set of specified users can access.