It is when a user opens a web page and a painted screen is shown to them, right where the content would be seen, before it is loaded. This concept, as the name suggests, points to the loading screen the users see until the content is loaded. The mentioned screen shows to the user that the page is currently being loaded. Loading screens help users to stay on the website by showing that the content is about to be rendered. FCP load time is another very important factor for websites.