good things is this
Pros •Great snowball character.
•Late game menace.
•Completely badass.
•Fun to play.
bad things

Cons •Bad early sustain.
•Low early damage to a gank.
•His CC can be hard to properly use.
•Tough to get the hang of.
•Easy to fall behind.

hey are you new to the jungle world?? in that case, u came to the right place
so you want to know when to gank and where??
in that case keep on reading well when to gank is often when you can see that your mate
cant keep on fighting mutch longer or maybe when you feel like it the art behind ganking is to gank when your target is closer to your turret then he/she's turrent if you dont have tuns of attack damage and movment speed what you shouldnt buy cuss then you would just get killed by the enemy again and again. Well sometimes its to late to gank what you atleast can do then is run to the target that killed your meat and atleast kill it

Counter hecarim can be simple' but if its a feeded hecarim dont even try.
well hecarim is strong against (hecarim is weak against)
jax
kha'zix
nautilus
jax
lee sin
vi
riven
akali
galio
and fiddle sticks
(hecarim is weak against)
nasus
sejuani
cho'gath
dr.mundo
irelia
and the 1 we all hate teemo
(HECARIM IS WEAK AGAINST ITEMS)¨
Randuins Omen, Exhaust, basically any slow, stun, or healing reduction ability like ignite or Tristanas E.

Nothing is quite the killer like going in for the knock back to be stunned. Vayne is great Vs Hecarim. Skarner is also good.

Idk

So haaaiiiii do you wanna learn how to play my little pony hecarim if thats so you came to the right place enyoy :)
http://www.youtube.com/watch?v=H36ri1Gjug4&list=UUapdTQbECzAUL7SX4A1FdzA&index=3 and dont worry the build they show in begin is outdated ;) now the cool comady :P
http://www.youtube.com/watch?v=Ip4Fc_RXvZg&list=UUapdTQbECzAUL7SX4A1FdzA
and no i didnt make this videos and i dont know who did but i just wanted to show you a little here how pros play him ;)

Hey my name is well just call me Bafin, my main champ is hecarim in the game League of legends. Well hecarim has given me so mutch. I mean his skills his great ganks, his fast way to kill monsters in the jungle' so, I wanted to give him something back. For all this Amazing stuff that he have given me. And i knew i couldnt thank the league but, then i came up with the idea and the idea was this'' ('if I make a great guide for hecarim that would have been something') ''after that i just kind of tried many items. Looked at many other guides but then i came up with this by looking at an other veary good guide. And this is it this is the guide enyoy