Start of with Blue and get some help from your budds with it. Move on to Wolves, Wraiths, Red, Golems, Wraiths and last Wolves again if you have the health for it. Go "b" and buy the spirit stone which will give you the possibility to hand the next blue to the mid champ. Jungle some more and try to gank if there is a chance for it. Otherwise wait for cash for the boots and gank then. Use your flash wisely and try to only use it offensively. You will want to rush in when you gank using your W spell and then flash and hit the enemy with your E spell so they land on a wall. This almost always leaves your laners to be able to go and get the kill on the stunned opponent.

When it comes to mid and late game you will want to work like a ball of death. Imagine that you are an unstopable force with great speed. When you have your phantom dancers or your 2nd zeal you will be incredibly fast. You can use this along with your ulti to easily kill low healths under towers. You can also use this when the enemy stacks up for a team fight. For then you can place your ulti on the enemy supporter and easily take out the enemy AD-carry and then run out before the enemy team can do anything. This leaves your team with the upper hand in the upcoming team fight. And remember that Poppy works like an assasin when it comes to team fights so don't run in first, instead hold back a bit and go in when your tank and bruiser has engaged and then you quickly finish any low healther off! Always use her speed!

Pros
-Ganks well
-Best turret diver
-Good engage hits
-Distance closer
-Has stun
-Very fast
-Difficult to kill one vs one(passive)
-Can take out enemy AD-carry easily
-Can take out entire enemy team when fed

Cons
-Takes significant damage while jungling
-Doesn't kill jungle fast
-Vulnerable to cc
-Not very powerful early game
-Has small mana pool (items try to fix that)

Since Poopy is such a weak jungler you must have the smite to make it in the jungle, end of story.
The flash on the other hand is not a must. I however like to have it because it can give the enemy a real surprise and get Poppy into positions that makes her being able to charge and stun the opponent. I have found this very usefull since it almost always results in a kill.

If you want you could change your flash to the Ghost spell. Ghost togheter with the W spell makes poppy very fast and can get her into positions for a kill very quick and still be active when you need to flee. I however have experienced that if you use ghost the enemy will just back off to quick and you end up looking like a fool who just wasted his ghost for nothing.

Almost all of the items i've recomended are rather common for Poopy. But this item is however not. I like this item in particular because it gives Poppy mana regen, tenacity and health. When you play Poppy in lane you almost always die becuase you end up with no mana, the mana regen of this item fix that for jungling poppy. People trying to cc Poppy is also one of the most common reasons you die with Poppy since she is so reliant on her speed and positioning, the tenacity of this item helps that. The final reason that always kills you is when you run out of health. This item gives poppy more health which together with her passive ability makes her very hard to nuke.

This is my first build guide so it would be nice if people could leave a comment saying what is good and what is bad about it! Have e great day and a good game!