i Just Done download Dragon Nest and Now i lvl 10..

May i know..
what is TRAINER ( how to use it ) and what it use for ?
and why need to use 3-4 acc for hunting/farming i cant understand it yet
So there is not such thing like no cooldown skills..

I'm sorry for my English..

I'm so grateful if all of u to share and guide me for this game.. Thank you so much for u help

p/s. i using laptop and my spec 8g ram/2g grapic card/ i5 core