The wiki summary here is good, and you can go read other sources if you'd like.
"Don't just throw up a wiki and hope that something miraculous will happen," he wrote in an email.
In his version of the story, he then convinced Wales to try the wiki approach.
a collaborative Web site set up to allow user editing and adding of content
1995; < Hawaiian wiki wiki quick
web page that can be edited by browsers, by 2002, abstracted from names of such sites (e.g. Wikipedia, launched January 2001), the original being WikiWikiWeb, introduced and named by Ward Cunningham in 1995, from Hawaiian wikiwiki "fast, swift."