A tread, or footstep, refers to the mark or impression left by a foot on a surface. It can be seen in various materials, such as soil, sand, or snow, and is often used to track movement or identify the presence of a person or animal. The pattern and depth of a tread can provide information about the weight and type of footwear, as well as the direction of travel. In addition to its physical presence, the concept of tread is important in fields like forensics and wildlife tracking. Forensic experts analyze treads to gather evidence in criminal investigations, while wildlife trackers use them to monitor animal behavior and movements.