You can publish them online, off-line or sell them to a person else.
If you are reading this, it must mean that in order to at least marginally interested in having a greener, healthier planet to live by. A "backlink" is a link on someone else's site pointing back to yours. https://digitaljournal.com/pr/news/press-advantage/contractors-state-license-center-offers-contractors-license-school-in-san-fernando-valley