when to use provider vs changenotifierprovider flutter code example

Example: provider flutter changeNotifierProvider

######## SINGLE MODEL #############
Provider(
  create: (_) => MyModel(),
  child: ...
)

######## MULTIPLE MODELS #############
MultiProvider(
  providers: [
    Provider<MY_MODEL1>(create: (_) => MY_MODEL1()),
    Provider<MY_MODEL2>(create: (_) => MY_MODEL2()),
    Provider<MY_MODEL3>(create: (_) => MY_MODEL3()),
  ],
  child: someWidget,
)