Zeri is the definition of a hypercarry with 1v5 potential.
You are really weak early but your insane at 3 Items once you get there your WR increases a lot.
You are very mobile, high APM, high DMG output.
Zeri isnt the hardest champ but she isnt easy to play either its a fair middle ground.

You lose every single lane matchup until lvl 6 after 6 you can look for fights.
But mostly just farm and scale.

Your mid game is better than your early once u finished shieldbow, pd you can look for skirmishes and fights. But keep farming to your IE.

You did it you finished scaling once u get IE now ur champs is crazy broken. Keep looking out on positioning urself well and always play fights front to back its rarely good to dive into enemy backline. Try to poke with ur W it does a **** ton of DMG at 3 Items. Its your turn to 1v9 now

Zeri is a hypermobile, high APM Marksman with huge play potential.
She needs some games to get used to spamming Q but once u got the hang of it its insanely fun seeing enemy team melting by your lasers and ur Q's.