When developing my code, I have seen people saying I should create a Store (eg: ProductStore) with ObservableObject/Published and inside of it, create functions to call the API (eg: ProductAPI) What's the reason for that ? Thank you

Checking an existing code, I could see an environmentObject set in my main file. What does it mean ? it means I am creating an instance of my store and making them available for the entire application ? Like a static instance in other languages ? or there is something else ? Thank you, @main struct myApp: App { var myStore = MyStore() var body: some Scene { WindowGroup { ContentView() .environmentObject(myStore)