What is the point of a loading screen?

Does Vis. automatically place the loading screen when something is loading, or is it just an aesthetic thing?
Thanks

it gets only displayed at game start. Dont know exactly what it preloads though :/

And if no loading screen is made, will it just freeze for a few seconds?
Thanks

Simon told me (if I remember correctly) that it's more useful for mobile builds, other than that it's more of an aesthetic thing. Normally the screen will be black until your first scene / menu fades in.

Thats what I thought. Thanks.