Nosework, also known as scent work or scent detection, is a dog sport created to emulate tasks performed by professional detection dog. In the sport, one dog and one handler form a team where the dog must find a hidden target odor, often ignoring distractions such as food or toys, and alert the handler once the target odor is found.
Image credit: U.S. Navy photo by Journalist 3rd Class Sunday E. Williams., Public domain
Adapted from Wikipedia, CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Nosework