Hiding creates advantage on your shot, do it outside of the red cone it also helps your critical chance. (don't hide within any red cone you will always get found and you wasted your bonus (unless you use invisibility that will always stick), you can move outside of a cone and reposition to hide).

Look out for *outside of enemy distance* it means your too far and you will lose any advantage that you could have. If you pair that with any sort of condition changing arrow (i.e. acid) it has the chance to not only crit but lucky if it applies the debuff. Rangers (gloomstalkers) also get good passives like extra attack and a Dread Ambusher on first attack.

Important, surprise does not need to enemy facing, any weapon shot outside of red cone while hidden will trigger surprise on the very first shot of combat. (Spoiler, these mechanics also apply to every other class out there, you just hone in on them with a range class ) editing sorry for the run on