I don’t understand archery levels

I was leveling my archery skill but I don’t understand what improvements does it make other than increasing the demage itself. I would like to know what other differences does it make . At some point I also realized that now the bow zooms in a little bit once o draw other than that I see no majo diferences.

Accuracy? My arrows seem more controlled with higher level than they were at the start.

Accuracy, your bow sways way less at lvl 10 as compared to lvl 5 for example.