If you google your exact question, "What is google reverse search?" one of the many responses you'll get is:
Find related images with reverse image search
You can use a picture to find related images from the web.
What you’ll find
When you search with a picture, your results may include:
- Similar images
- The websites that contain these images
- Other sizes of the picture you searched with
How Google uses the pictures you search with
The pictures or URLs you upload in your search are stored by Google. We’ll only use them to make our products and services better.
and blah,blah, blah … hope this helps
@Seth1805
Hmmm, interesting to note that if Google does not have the pic before you upload it in your search they do afterwards and store it. Be careful & selective of the pics you choose to search with (especially any private pics you upload in the search).