What are nat runners?

Why do people say there looking for law runners or nat runnners?

well for nat runners its people who usually want nature runes but are too lazy to walk back and forth to tai bwo wannai general store and switch noted ess for unoted and bring it back to the nature runecrafter who pays around 7k per trip and he gets the runes.

for the law runners they mostly do it for fast exp where they have people run back and forth from draynor bank unoting ess and brining it back in exchange for law runes.

well some people aswell they give u the laws or natures as a payment because mabye they just want the XP but if u get payed for nat or law runns it bette be good pay insted of air runners u only get payed 2k =P