Strategy Design Pattern is one of the behavioral design patterns.
Its main goal is to decouple the behavior of an object from its state by modeling the behavior into an abstraction which could have more than one implementation.
Then, this abstracted behavior could be used by the object with the capability of switching between the different implementations of the behavior at run time without the need to re-create the object.
The Strategy Design Pattern is widely used nowadays. Most probably almost every solution you would come across would be using it.
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