Pretty important. If you're diamond with a .7 kd youre carried. But if your gold with a 1.4 kd you're good.
Is a 1KD good?
More important than W/L
KD dosent mater it is all about how good you play with your team and how much you support the team it has nothing to do with the kills
Personally I think it’s important it shows your consistent :) I’m a plat 2 with a 1.2 going up atm