A lot of images and files are the top reason while your page takes a long time to load, just because they can take up to 50% of the average bytes loaded on a page as well as a massive amount of HTTP requests. Caching is how your site can be downloaded to a temporary storage space so that your subsequent pages can load at a higher speed. Use caches to reduce the number of images on your site large images can cost your page a couple of seconds to load.”]
Source: https://gbhackers.com/5-simple-ways-to-reduce-page-load-time/