Google Images currently displays three IPTC Photo Metadata fields next to a photo in the search results - if they are embedded!
- Credit Line
- Copyright Notice
Google Images plans to display two additional fields in summer 2020:
- Web Statement of Rights (also labelled as Copyright Info URL)
- the URL field of a Licensor (called Licensor URL in many documents)Read more about it on the IPTC site
- with links to Google documents.
All these fields can be set by the form of this site