Physical evidence refers to the tangible components of a service that facilitate performance or communication of the service. It includes the environment in which the service is delivered and where customers interact with the business. Physical evidence can be essential, such as the facilities required to deliver the service, or peripheral, which enhances but is not essential to the service. It plays important roles such as creating atmosphere, building trust, influencing perceptions of quality, facilitating service delivery, and differentiating a business from competitors. Examples of physical evidence include facility design, equipment, signage, employee appearance and performance.