An Angular application is structured around modules, components, templates, metadata, data binding, directives, services, and dependency injection. Modules: Angular apps are modular and every app has at least one Angular module, the root module, which is the starting point. Components: The building blocks of an Angular application. Each component consists of an HTML template and a TypeScript class that controls a part of the screen. Templates: Define the view for Angular components. Metadata: Adds more data to an Angular class to specify how the component should be processed and used. Data Binding: Mechanism to coordinate data between the component and the view. Directives: Special tokens in the markup that tell the library to do something to a DOM element. Services: Classes that handle data logic and can be shared across components. Dependency Injection: A design pattern that makes it possible to inject dependencies into components, services, etc.