One thing I one day want to try is to include some unique search terms in an image EXIF description to see if Googlebot picks it up in a way that is subsequentl

One thing I one day want to try is to include some unique search terms in an image EXIF description to see if Googlebot picks it up in a way that is subsequently searchable. As for Wordpress people using third party services to remove bloat from images in a paid for, tediously manual way - don't! Configure your server to do it with Google's mod_pagespeed. You can serve src_set images whilst you are at it that way making the web quicker and more eco friendly.