Easy way to see how GazoPa works is to click a sample image on top page. Click ‘stock photo’ tab on search results page. Stock photos that are similar to sample images would be displayed
They say: “Are you struggling to find a good stock photo? GazoPa provides you an easy and intuitive way to find photos. Just upload an image to GazoPa and GazoPa helps you to find similar stock photos. If you want to see alternative choices, click any images on the page and the system shows you other images that are similar to clicked one.
Searching for Flickr photos with Creative Commons has been popular for years at GazoPa. Adding stock photos to our database helps users to find images from broader range. Stock photos from Shutterstock is available now and other stock photos will be added to our database soon.”