It’s UI design language: https://developer.android.com/reference/com/google/android/m...

> latest and shittiest marketing lingo

It exists since Android 6: https://developer.android.com/reference/com/google/android/m...

Informative banner that does not require user interaction to dismiss.

Snackbar isn't a particularly new term, it goes back, IIRC, to the first version of Material Design and is similar to a toast but different in that snackbars may support interaction whereas toasts are non-interactive.

An in-app notification along the bottom of your screen. Usually just some text on a dark grey or black background.

> shittiest marketing lingo

Is that what you call the words you don't understand?