Prerendering generates the finished HTML of every page at build time, before anyone visits. Crawlers, AI bots and the visitor's first paint all get complete content instantly, with no JavaScript required; the interactive application then takes over in the browser. It combines a static site's speed and readability with a web app's interactivity.
This site is built exactly that way: every page, in both languages, exists as real HTML before React loads. It is a standard part of our web application builds.