this is the first build i have made.
olaf is a good champion i like to play, here is a guide i have tried to make.
olaf is my main and i have played him for a long time.

start with cloth armor and 5 health pots or shoes and 3 health pots.
you have to se if you need more attack or armor/magical resistance.

his Q is really good and its that you throw a axe and slows and hurts the targets.

his W is good that engage lifesteal and speel wamp.

his E is olaf main damage on olaf and its really op.

his R is that he became much more defencive.

the runes i havent choose yet so you have to choose them by your self