in 9.8, Wargaming is introducing ribbons for in battle performance, you will receive them directly in combat. Currently there are only eight but the developers stated that "if the players like this, there will be as many as 30 in the future". These ribbons are given for example for: damage dealt, critical hit, kill, bouncing shots with armor, spotting, assisting allies etc.
This is how they look:
And this is where WG got their inspiration from...