Optimizing your media library is one of the easiest ways to boost site speed...

https://fast-wiki.win/index.php/When_Should_I_Use_PNG_Instead_of_JPEG_for_SEO%3F_(And_Why_Your_Media_Library_is_Slowing_You_Down)

Optimizing your media library is one of the easiest ways to boost site speed and search rankings. Start by renaming files with descriptive keywords instead of generic numbers, and always add helpful alt text for accessibility and context