Asyncio uses cooperative multitasking to achieve concurrency. When our application reaches a point where it could wait a while for a result to come back, we explicitly mark this in code.

async - let us to define a coroutine.
await - let us pause our coroutine when we have a long-running operation. Blocking operation.
Task - wraps a coroutine and schedules it to run on the event loop immediately (in the background)