Zed is one of the best assassins right now, able to combo out adcs and escape with his life in order to fight longer in teamfights. His burst damage is enough to quickly get down high value targets, and enough escape to get out of sticky situations. He has great mobility, and with that some of the best gap closing with finishing blow.

Harass with shurikens, for ranged harass try: w, e, q. For a more heavy harass, try w, e q, w, aa
Use your w's for escapes.

When someone is below 700 health in lane, you can almost always get him, especially if you have botrk. Try: R, Botrk Active, r, e, q, aa, w, w, aa ignite.
That combo will almost always get them, if they dont out dps you or have op escape.
Zed is quite slippery. Be aware of you two shadows, and use them to try and juke as much as you can.

Clear waves with w, e , q. Its an incredible clear.

Pros: High Damage, Nice escape, Very fun to play

Cons: Gets shut down by cc, squishy