Re: Help menu (was: Re: describe-bindings: ^L, bad order, naming)

[Richard M. Stallman]

    The first item, "This...", lets you type a key sequence or click something
    (e.g. mode-line, minibuffer, Emacs-related name in a buffer, menu item), and
    it gives you information on that object. The info is that provided by
    `describe-*', plus apropos + Info doc, if appropriate.

I don't see concretely how that differs from C-h k.
Could you give details?