Optimizing your images is one of the quickest ways to fix a sluggish site....

https://www.booknose.win/optimizing-images-is-the-easiest-way-to-boost-your-site-s-speed-and-search

Optimizing your images is one of the quickest ways to fix a sluggish site. Start by renaming your files to be descriptive and writing helpful, relevant alt text for accessibility