State management is a design pattern with help to manage their state and UI. Without refresh the screen. It’s reduce the multiple request and refresh screen. If any data changes or new data is added then state management provider data will refresh automatic.
Provider is the most popular library and many flutter developer using this library and it’s a good choice to use. Implementation is simple and easy to learning is also faster then by Bloc.
Bloc the biggest popularity and many of the developer community to use. Bloc is older than other library. BloC can be hard for learning and understanding for newcomers the business Logic, which separates design pattern from business logic.
GetX is the most popular library in last couple of years. GetX is similar as Provider, you cannot write any extra code, don’t have a lot of unnecessary bolerplate code, its easy to learn it very fast and it’s a good choice to use.