To improve the site loading speed, there is a beneficial technique that delays the loading of offscreen images, which are considered non-critical resources, and keeps them "off-screen" until the user needs them by scrolling the page to the locations of those images. Here you can choose the type of "off-screen" images until they are displayed "on-screen". Select the "Default" value to always show the images, but keep in mind that it may increase the site loading time.