One of the main reasons to prefer Provider over Statefulwidget s is that, using Provider , you will rebuild only the widgets that needs that value (the Consumers ) while the other will not be rebuilt . Instead when you call setState the whole build function of the widget will be called.
Read moreWhat is ChangeNotifier Flutter?
ChangeNotifier is a simple class included in the Flutter SDK which provides change notification to its listeners . In other words, if something is a ChangeNotifier , you can subscribe to its changes.
Read more