An acoustic guitar is a stringed musical instrument that produces sound through the vibration of its strings. It typically has a hollow body, which amplifies the sound naturally without the need for electronic equipment. Acoustic guitars come in various shapes and sizes, with the most common types being dreadnought, concert, and classical. The instrument usually has six strings, although variations with twelve strings exist. Players can use their fingers or a pick to strum or pluck the strings. Acoustic guitars are popular in many music genres, including folk, country, and rock, making them versatile for both solo performances and group settings.