Bare Metal refers to a physical computer server utilized by a single tenant. Unlike virtual servers running on shared hardware, Bare Metal servers are dedicated entirely to the entity renting them. This service offers complete control over the physical machine, allowing flexibility in choosing the operating system and fine-tuning hardware and software for specific, often data-intensive, workloads. It's a foundational component of the Infrastructure-as-a-Service (IaaS) stack in cloud computing, providing enhanced physical isolation, security, and performance.