What is a service in AngularJS?

At its core, a service in AngularJS is designed to encapsulate business logic, making it accessible throughout the application without duplicating code. This is crucial for maintaining a clean and manageable codebase, especially in complex applications. Services are instantiated with the 'service' method or the 'factory' method in AngularJS, and once created, they can be injected into controllers, directives, filters, and other services, thanks to AngularJS's dependency injection mechanic.

Typical use cases for services include tasks such as making HTTP requests to fetch or send data to a back-end server, encapsulating complex business logic, managing shared state between components, or even as a utility for common functionalities, such as date formatting...