u/soupcutie

Hey, I just started playing overwatch a couple of weeks ago and Juno is my main character.
I have been watching lots of tutorials on how to play her more proactively and as I am starting to learn the maps I feel that I'm starting to get better.
I have seen a couple of top player videos and I'm wondering about her melee attack. These top players use her kick pretty often, what is the purpose of it, is there some kind of trick behind it? Cause it's used even when just zooming around and ai can't understand that