Requirements: Adobe Lightroom sub, keyword list (likely in a google doc or note file)
step 1: load images into adobe lightroom
step 2: click keyword icon in lower right of app window [ screen grab of icon ]
step 3: highlight all images from the photoset you would like to add keywords to
step 4: copy your keyword list then paste into the keyword panel in lightroom [ image of keyword panel before/after ]
step 5: export images and load them into your website [ image]