How are classes initialized in a Laravel service container?

Question

Laravel

Short question, I can't figure it out.
The service container contains instances of user classes (created by us) and service ones, so to speak.
I can’t understand, these instances are created there on demand, for example, when we call
App::make('our class bound through the service provider') in the controller, an instance of the required class is created, or every time the application starts, all objects are created by a 'heap' and then they just give it to us. ?

Answer 1

On demand and nothing else.