Rust: What is the difference between poll and wake?

1use std::future::Future;
2use std::pin::Pin;
3use std::task::{Context, Poll};
4
5struct MyFuture {
6    data: String,
7}
8
9impl Future for MyFuture {
10    type Output = String;
11    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
12        Poll::Ready(self.data.clone())
13    }
14}