… down. Memory recorded by listening does not discriminate important from non-important information. However,writing creates spatial regions between important and non-important pieces of information — allowing your memory to target and ingrain the important stuff you want to remember.
… read and hear. However, when you write down the things you’ve learned, you retain them far better. Even if you never re-read what you’ve written, the simple act of writing something down increases brain development and memory.