do Whiteboard smart.

The public board is accessible to everyone. It is a happily disorganized mess where you can meet with anonymous strangers and draw together. Everything there is ephemeral.

You can create a private board with a random name, that will be accessible only by its link. Use this if you want to share private information.

You can also create a named private board, with a custom URL, that will be accessible to all those who know its name.