What is Asymmetric cryptography?

Asymmetric cryptography, also known as public-key​:key: cryptography, is one of the key components of blockchain technology.:black_square_button:

:mag_right:Why is asymmetric encryption​:chains: different
from symmetric encryption?:closed_lock_with_key:

💁🏻We’ll explain all of these in plain English!:writing_hand:t4: