Here it is, line-by-line: You shoot an arrow. Assuming it didn't get reflected or destroyed during its flight towards an enemy (can be intercepted by an enemy in its path), the following will happen:

35 damage recieved by the poor sod that ate your shot (can critically strike, multiplied by your ferocity (15 ferocity is 1% extra critical damage)

6 stacks of bleeding on your target for 12 seconds. Bleed is a damaging condition, dealing damage* over time.

Next up, it says it is a projectile combo finisher, which means, if you were to shoot it through a burning area, you were to deal one additional stack of burn for a second, or if shot through lightning area, it would become a brutal shot, adding extra damage on top of its other effects.

Lastly, the range of the spell. On arrow based attacks, these range numbers are just a basis, they fly further than the range indicated there (and will not deal less damage outside the range).