A pattern, often referred to as a template, is a repeated design or model that serves as a guide for creating similar items. Patterns can be found in various fields, including art, architecture, and nature. They help maintain consistency and efficiency in production, allowing for the replication of shapes, colors, or structures. In programming, a pattern can refer to a design pattern, which is a general reusable solution to a commonly occurring problem within a given context. These patterns, such as the Singleton or Observer patterns, provide a framework for developers to build upon, improving code organization and maintainability.