JavaBeans are reusable software components written in the Java programming language. They follow specific conventions, such as having a no-argument constructor, providing getter and setter methods for accessing properties, and being serializable. This design allows developers to create modular applications that can be easily manipulated in visual development environments. These components can encapsulate multiple objects into a single object, making it easier to manage complex data. JavaBeans are commonly used in enterprise applications, particularly in conjunction with Java EE technologies, to facilitate the development of scalable and maintainable software solutions.