Do you want to feel like a badass as you dive 3 towers deep and secure a kill? Do you want to be tanky but still do damage and heal a **** load? Well my friend, Warwick is definitely for you. This guide will detail both hybrid attack speed/tank build and a full tank build, and is intended for lower elo players that want to carry their games in hopes of getting out of Bronze 5. p.s im only gold 5 so the matchups might differ thx

Eternal Hunger
// You do extra damage above 50% health, and switch to healing mode when you drop below 50%. It heals more when you're at 25% HP.
// Early game, this will decide the fate of your 1v1s. Maximize your damage output above 50% HP, and don't be afraid to fight when you're low - you have a higher chance to come out on top if they used all their burst. Basically just remember that you can actually heal with your passive.
Jaws of the Beast
// Warwick bites an enemy and heals. That's it. Also you follow their movements if you hold down the key.
// This ability is simple and easy to understand - BUT ITS BUGGED TO ****. When you're close, be sure to HOLD the key until you appear behind the enemy, otherwise you'll just bite them and not follow them and you'll look like an idiot (speaking from personal experience). Use it to heal rapidly during a 1v1 and to execute someone, use it to follow them or predict flashes, use it in conjunction with Primal Howl, and don't drop it too fast - utilize your passive to deal damage first (until you level up your Q higher). THIS ABILITY DOES MAGIC DAMAGE.
Blood Hunt
// Bloodseeke- I mean Warwick stops for a while and now can run extremely fast to the closest enemy while gaining higher attack speed against it. Passively tracks any enemy that is low and gives the same bonuses. Bonuses triple against extremely low health enemies.
// This is what makes playing Warwick so exciting. You can use the passive part to clear the jungle fast and track down enemies globally; the attack speed bonus essentially gives you an auto attack reset. The hard part is know HOW AND WHEN you should chase the enemy - DON'T dive them under tower (unless your W is leveled because it increases the movement speed bonus and if you have Ghost) DON'T go for it if you will just get stunned and die, and DO NOT follow the trail if the person who is low is stuck in between their tank and their support. Use the active as a way to "ward" (to know if someone is doing Dragon, etc) and obviously activate it while you're ganking. YOUR TARGET FOR ASSASSINATION HAS TO BE THE ONE CLOSEST TO YOU. And also you can't cast this spell while you're in a fight.

Primal Howl
// Reduces damage taken (generally in half) and after a while Warwick releases a shockwave that fears enemies and makes them walk AWAY from him. Can be casted early to fear earlier but you lose the damage reduction.
// This ability is extremely flexible and along with Eternal Hunger it will decide your 1v1s and survivability. Use it to defend yourself from an obvious skillshot and a Rengar leap. Don't activate it too early when you're ganking, make sure you're close enough to dash to the enemy with Jaws of the Beast. When you do land the fear, Don't just stand there and follow them, try to go around them because a fear will always push enemies AWAY from you meaning you have one second to force the enemy to walk to your laner/teammates. Chain this with your ult for 3.5 seconds of lockdown on one enemy. Also, this ability Will instantly activate when you land your ult - the fear will not go off after 2.5 seconds but it will activate the instant you land Infinite Duress. Use it to disrupt the enemies and make it easier for your teammates to follow up.
Infinite Duress
// Warwick leaps at a target location and stops at the first enemy hit, suppressing them for two seconds and dealing magic damage over time and applying on hit effects. Heals for 100% of the damage done during the duration. The leap cannot be interrupted by anything.
// This scales off your movement speed, so building Mobility Boots early game when you're ahead can secure many kills. Make sure to pop your Red Smite to deal extra damage. This ability does have a deceiving range - it never goes its full distance and instead causes you to slide further away from the full range of the ultimate. Basically, if you miss it you go further than the intended range. You don't have to use this from it's full range - You can use it during close combat to ensure you get the kill and heal up if you're losing a 1v1, and with Bloodrazor, you can deal a **** load of damage. DO NOT randomly jump into teamfights with this - lock down a key target. Get to whoever you want to get to by charging behind the enemy team or from a blind spot and Primal Howl the entire enemy team and your team can come in from the front and take care of the rest.