A Sniffer job typically involves detecting and identifying specific substances, such as detecting contraband, illegal drugs, explosives, or quality control in industries like perfumes and food. Sniffers can be trained professionals using detection equipment or specially trained animals, such as dogs, that rely on their sense of smell. These roles are commonly found in law enforcement, security, customs, and certain industrial sectors. The job requires strong attention to detail, specialized training, and adherence to strict safety protocols.