Google Photos can identify the majority of faces in your photos and videos. It can then display all the same person’s photos and videos together.
If we want to explore a person’s connections, track events he has taken part in, or find other photo-based information, we can upload a photo of his face (from LinkedIn or other sources) and then upload a bunch of photos or videos from events, meetings , conferences, social posts, and more, and automatically find all the photos he appears in and the people he interacts with.
To use this feature on PC, go to https://photos.google.com/search, and you’ll see the faces it recognizes. By clicking on the relevant photo, will get all the photos he appears in.

You can add a name to the target, for easily find all his content by searching his name.
We can also try searching for a company name, and to get all the content it appears in (in signs, logos etc.)