Wikipedia is the 8th-most-visited website in the world, and comes near the top in search results. Anyone can edit Wikipedia, and the articles are written by volunteers; currently, there are about 250,000 editors / Wikipedians around the world.
I started editing during a workshop (edit-a-thon) run by the Dowse Art Museum in Lower Hutt focusing in Māori women artists. I discovered a surprising lack of articles about the arts in Aotearoa.
These are some of the articles I have started. Anybody can become an editor and improve content.