Optimizing images is the quickest way to boost site speed and crawlability....

https://page-wiki.win/index.php/What_Is_a_Good_Caption_for_Images_on_a_How-To_Post%3F_A_Guide_to_Image_Context_SEO

Optimizing images is the quickest way to boost site speed and crawlability. Start by renaming files with descriptive keywords rather than generic strings. Add descriptive alt text for accessibility and search engine context