bind returns a function which will act like the original function but with this predefined. It is usually used when you want to pass a function to an event handler or other async callback.
call and apply will call a function immediately letting you specify both the value of this and any arguments the function will receive.
Your second example defines an anonymous function which calls apply. This is a common pattern; bind provides a standard implementation of that which allows you to do it with a simple function call (thus being quicker and easier to write).
