Olafs earlygame is strong. on redside start w do Red-->Raptors-->Blue. If lanes are gankable gank mid or top, otherwise take scuddle and see if enemy raptors are taken. If your laners are overextended, ping them back or set up a countergank instead. your first back should be around 950 gold at best, so you can get chilling smite and boots for your predator. keep providing pressure for your team, and gank as often as possible (If possible)

(:Note Olaf is one of the only junglers atm that can solo raptors at level 2 while staying healthy, if you go under 50% hp you need to be better with axes)

This is where olaf truly shines. After he gets the additional movement speed from Righteous glory, Olaf can really start doing work for his teammate, and bring havock to the enemy backlines. Look for flanking opponents, and turn on them. In my experience this confuses the enemy team and leaves makes them hesitant. If possible you will want to give kills to your carries as íf the game progresses to over 35 min, you won't be as strong.

Hopefully you should have ended the game by now, but don't worry, you are not useless. If you are against a heavy carry like corki or Kai sa, do not jump the gun and rush them. peel for your carries and pressure the enemy backline with slow from your axes. (DO NOT rush the enemy backline if they have say a janna or lulu, you will get destroyed) You can provide a safety net for your team tanking cc and help to clear vision from baron and dragon areas.