What role does the rope on the archer play in the Olympic archery competition? How?

In order to reduce the influence of the hand on the bow, the bow is usually pushed instead of held, so the bow will jump forward after an arrow is shot. In order to prevent the bow from falling, you need to tie it to your hand with a rope.

A piece of rope is tied to the index finger. After holding the bow, bypass the front end of the bow handle and tie the other end of the rope to your thumb.