Skirling is the act of playing the bagpipes. It is a traditional form of music that originated in Scotland and Ireland, and is now popular around the world. The sound of skirling is created by blowing air into the bagpipe and squeezing the bag with the arm to create a continuous sound. The player then uses their fingers to manipulate the reeds of the instrument to create different notes and melodies. Skirling is an important part of many traditional Celtic music performances.