Scopes In Angular

$Scope is a core fundamental of an Angular app. Scopes of the Angular app refer to the model. Scopes provide bridge between the controller and the view. Just before our app renders the view to the user, the view template links to the scope, and the app sets up the DOM to notify Angular for property changes.

source https://www.c-sharpcorner.com/Blogs/scopes-in-angularjs