Private vs public
Private trees are for your own workspace. Public trees are published versions you can share with others. This separation lets you keep working privately while deciding what, if anything, becomes public.
Forking and reuse
Published trees can optionally allow forking. That lets other users copy the public structure into their own workspace and build from it. This makes the app useful not only as a personal planning tool, but also as a template and community learning system.
Embeds and templates
Public trees can also be embedded for read-only viewing. Templates take this one step further by turning useful public trees into reusable starting points that others can browse and adopt more intentionally.