Optimising images for Google and other Search engines is easy in Udo and an important part of your SEO strategy. All images should be named properly and Alt tags filled out explaining what the image is and using important keywords specifically for the page or product where the image is placed.
All images should have a Title & the Alt text field - see sample below.
Many browser search via images in Google today, a quick way to find what you're looking for and many website owners don't take full advantage of this.
You can place a credit for the image and add tags. Tags are used for calling images in content filters, grids, galleries etc and when searching for the image in the admin section.