After loading the page, the plugin starts to follow the user’s screen. And as soon as a link appears on the screen within your site – the browser executes the request and downloads it. Now that the user clicks on the link, the browser will instantly display a new cache page. Thus, User Experience will indicate that your site is loading instantly.
The plugin uses the built-in browser features to predict user behavior for preloading the tourniquet. See this
The plugin also registers a global feature that you can use to preload any URL:
window.prefetch('https://example.com/custom/page')