Google Images allows users to upload an image and use the "See exact matches" feature to find all instances of that image across the web. This can help identify who has used the image without permission.
Mike Hardaker from Mountain Weekly News highlighted this feature, noting its utility in tracking down unauthorized uses of his photos. He mentioned that Google Lens now offers a "See exact matches" tab, similar to the "Find Image source" function.
For instance, this feature found a photo taken at the Google NYC office of the Google algorithm wall in various locations online. Users can then request the removal or proper crediting of their images.