Angular services are injectable and singleton classes. Angular makes it really easy to use angular services using dependency injection. Angular injector makes your component much flexible in terms of dependencies.
Angular service is the right place to right angular application logic which can be re-used by other components. Angular services can be made to behave as an adapter among the components. Usually, angular services used as a data exchanging layer among/between the components which do not share parent-child relationships.
Angular service encapsulates the core logic and makes it easier for the developer to use them with ease.
Angular services can also be used to make HTTP calls, store data or application state, etc.
Angular service also makes it really easy that your code is unit tested.
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