Wikipedia is the fifth most visited website in the world, and in a presidential race in which millions of people use the site to research Hillary Clinton and Donald Trump, some of the most influential figures in the race are almost completely unknown.

Wikipedia editors, many of whom are unpaid and live across the globe, take it upon themselves to manage every word, link and image published to Trump’s and Clinton’s biographical and campaign pages.

[ Wikipedia is fixing one of the Internet’s biggest flaws]

Because of Wikipedia’s high profile – more than 4.1 billion page views for its English sites so far in October – editors effectively write an election guide with convenient summaries on candidates’ pages that often sit at the top of search results.

Since Clinton and Trump announced their candidacies in 2015, their biographical pages have been edited nearly 12,000 times by more than 2,000 unique users, according to Wikipedia revision history statistics, which publicly logs every edit.