Cellists are musicians who play the cello, a string instrument that is larger than a violin and smaller than a double bass. The cello has a deep, rich sound and is played by sitting down and using a bow to create music. It is a key instrument in orchestras and chamber music, often providing harmony and depth to compositions. Cellists can perform a wide range of music, from classical to contemporary genres. They often study music theory and technique to master their instrument. Notable cellists, such as Yo-Yo Ma, have gained international acclaim for their performances and contributions to music education.