Description: In the context of Angular, an ‘Expression’ refers to a representation of a calculation that can be evaluated within the application. These expressions are fundamental for data binding, allowing values to be automatically updated in the user interface when they change in the data model. Expressions in Angular are similar to expressions in other programming languages, where arithmetic, logical, and comparison operators can be used to perform calculations and evaluations. Additionally, Angular allows the use of expressions in HTML templates, making it easier to create dynamic and reactive interfaces. Expressions can include variables, functions, and object properties, providing great flexibility and power when developing web applications. Their ability to evaluate and display data in real-time is one of the features that sets Angular apart from other frameworks, making the user experience more interactive and fluid.