Toasts are as flexible as you need and have very little required markup. At a minimum, we require a single element to contain your “toasted” content and strongly encourage a dismiss button.
Toasts are slightly translucent, too, so they blend over whatever they might appear over.
When you have multiple toasts, we default to vertiaclly stacking them in a readable manner.
Place toasts with custom CSS as you need them. The top right is often used for notifications, as is the top middle.