A powerful feature of orgmode/emacs is the ability to easily and rapidly insert footnotes^{1 (See section )} and then easily export them, even as html.^{2 (See section )} You can learn all about the commands in the official manual entry.

Footnotes:

^{1 (See section )} Just like this one, using C-c C-x f

^{2 (See section )} Export as HTML and view in browser using: C-c C-e h o