This is my olaf build, i made it mostley for my self to watch, when i sometime feel uncertain what to buy, or what to get. I started playing Olaf because he is a Viking, that speaks for it self. Also beeing a man of the north i decided to give him a try and i loved it, i have always had my eyes on Olaf but nothing ever really happned, i just bought some other characters, buying AP runes for my Twisted Fate etc. But now is the time finally.

I love Olaf because you feel like a boss, you can easily bee that half tank guy, meanwhile dooing tons of damage by activating your W or throwing the Reckless Swing, wich is perfect against a squisy opponent.

Playing like Olaf is having a load of HP to make his W worth using, and oh boy it is. When you later buy an atmas wich also is capped by HP you can fell how dominating you truly are.

Starting of with a dorans blade is right about perfect, dmg + hp + a little bit of life steal is a great start up. Starting with the axe to harass your enemys, but also great for the first charge of the bush, dealing dmg + slow, and if you pick it up you can throw it right back again. Olaf is great in lane with a stunner, beeing able to run forward and throw his true dmg, continued by an auto attack, the enemy will flee. Tasting the axe in their back as they try to escape the have a certain death ahead.

I am new to the whole jungling part, but with his W the jungling works like a charm, easily takes the blue buff, making him soon able to throw his axe non stopp. Starting with blue buff, using smite as finish. move on to wolfs and life steal a bit. Carry on to wraiths, golems and latest red buff, you should be able to take it beacause by now you have your smite again.

start Ganking at lvl 4 when you ahve your true dmg, the first ganks can be hard to kill them, but they sure will flee atleast

Pros:
Awsome late game with a big dmg and nice hp
Ulti is perfect for teamfights
The Reckless Swing is freaking Epic if someone think he can take on you, like some AD carry

Cons:
Only escape is to slow enemys with axe
Low mana early game (fixed when get sheen + trinity force)
easily harassed