The term "Volume Rocker" refers to a button or set of buttons on an electronic device that is used to adjust the volume level. This feature allows users to increase or decrease the sound output without having to navigate through menus or settings. The name comes from the action of pressing these buttons, which causes the volume to change in small increments (like "rocking" the volume up or down). Volume rockers are commonly found on smartphones, tablets, and other portable devices with built-in speakers or headphone jacks.