Description: The Pipe transformation in Angular is an interface that defines the required method for creating a custom pipe. Pipes are a fundamental feature in Angular that allows for the transformation of data in templates in a simple and efficient manner. By implementing a pipe, developers can modify the presentation of data without altering the underlying logic of the application. This interface provides a transform method that takes an input value and converts it into an output value, thus allowing for real-time data manipulation. Pipes can be used to format dates, currencies, texts, and much more, facilitating the creation of more dynamic and attractive user interfaces. Additionally, pipes can be pure or impure, meaning they can or cannot be recalculated on each change detection cycle of Angular, providing flexibility in their use. In summary, the Pipe transformation is a powerful tool that allows developers to create more interactive and customized applications, enhancing the user experience.