Olaf is one of the top few solo top/ junglers in the game. He has great sustain with Tough It Out and his Reckless Swing deals HUGE damage throughout the game. I know my item build/ skill sequence doesnt make much sense for a traditional Olaf,but its one of the best for all types of games (ranked or not).

PROS
holy goodness damage
absolutely murders tanks and carries
brolaf is one of the best skins in the game

CONS
can be easily kited pre level 6 w/o Ragnarok
mediocre harass
sustain can be hard since you need to farm to get back health

I go with a 17/13/0 mastery page to help set up a good early game for Olaf

these items i find to work very good on ad/ bruiser Olaf.

Heart of Gold- I like this item for the extra gold/ early game health
Ninja Tabi- best boots.I like to alternate with Mercury Treads depending on the other team
Zeke's herald- this item is good because of the health/ lifesteal/and attack speed.


I only mentioned these because they are more controversial

so this was my first guide, so please please please leave suggestions/ criticisms.