olaf with my build will dominate early game. he is a great early game champion but most people dont realise. level up undertow first but after that put two points on reckless swing and you will have great power against squishy characters. level up you vicious strikes at level four so you can win trades.

Olaf's late game depends on a couple of things.
1. with lots of farm comes lots of items
2. if olaf gets some early kills in lane then he will win the laning phase
3. olaf has recently been buffed and with that he has a very strong lane

make sure too level up quickly and farm minions as much as possible. if a champion (especially a squishy one) is over extended then dont hesitate to try kill them. after about level four you can easily destroy them

start with cloth and 5 for for a top lane (this build is for top lane) and then dont be shy to play agresively in lane, with those 5 pots you have ok sustain combined with your w, my build is more of a tanky olaf but late game with his low cd e he will rip through the ad carry/ ap carry

if you go mid then you have probelems such as facing a good anivia,cassiopea,caitlyn,kog'maw who can easily stop your farm with ranged pokes that eventually kill you if you are not careful. dont get me wrong, feel free to gank middle,top and kill them but you have to remember olaf has limits lkke everybody else

olaf's ulti makes him immune to cc and gives him armour pen, mag resist and armour, the active can be more difficult than you realise to time right, olaf with his ulti on has good initiation but if you do run in axes blazing then make sure your team follows because once that ulti runs out you will be targeted if you are by yourself, you can also use it when running away but don't waste it on someone like cleanse/flash ad carry because they have little to no cc and it will be a waste. another bad time to use it is when you are definitely going to die, if you are in a 4v1 and you know that in reality you cant escape then why bother activating it