Basically Tanky-DPS.

Boots -> Warmog -> atmas -> frozen Mallot -> what ever team comp is.

If you have to, aim your reckless swing at tanks. This is perfect when they're at low hp, because your true damage will destroy.

If your fed, get a blood thirster.

Hello! I've decided to make an quick and easy olaf build since i play him alot. This will be a 5 minutes guide, it wont take you long.
Key priorities in playing olaf is that your enemy team comp. Look at who they are, see if you need more magic resist, because then you will need to drastically change your items if you are following right for this guide.

Basically, Olaf has 3 choices of boots ; Ninja Tabi; Merc Treads, and Berzerker Greaves.

If the enemy team is composed of 4 Ad's, go with Tabi.
If the enemy team has alot of casters, or perma-stuns, then go for merc threads.
Zerker Greaves are really for a quick way to get attack speed, but i really dont recommend them because your going to be taking most of the damage from the enemy team.

You want to max out your Reckless Swing first, then your axe.
WHY? Because at level 10, you should have boots, warmogs, and maybe even atmas. If you start to go into a battle, you open up with your axe, which will do a very fair amount of damage, on top of your Swing, the enemy team will be confused.

You have alot of health, you have a decent amount of armour, and you do ALOT OF DAMAGE. The question of the enemy team is that " do we focus him?"

If they focus you, then they are focusing the tank, and your carries will destroy them
If they DONT focus you, then you still will KILL the carry with your true damage and axe.

The only problem is that if the enemy team has alot of magic resist, then you have to get a banshees veil right after atmas, because of the damage they will be focusing on you.

Start with a warmog early in game, build your boots, and get an atmas impaler.
This is your bread and butter. THe next item really depends on the enemy COMP.

Casters? = FoN, Veil
Damage? - Frozen Mallot, Sunfire

If your REALLY fed, like face rolling, then get a blood thirster.
I wouldn't really suggest getting a GA, but if you really want to, go ahead.

If the enemy team is full of AD's, go with this build. They will be very dissapointed when they see you mauling their team. With atmas, frozen mallot, and sunfire cape acting as your resist, they will be so confused as in why you are tanking all the damage, and at the same time, ripping them apart.

Comment Below please, This is my first guide!