The idea is that while you're waiting on some kind of I/O or other asynchronous activity to complete, the thread you're on can do some other work. Threads are r

The idea is that while you're waiting on some kind of I/O or other asynchronous activity to complete, the thread you're on can do some other work. Threads are relatively heavyweight compared to the sort of cooperative multitasking that can be done through await or callbacks.