A guitar is a stringed musical instrument typically made of wood, featuring a long neck and a flat body. It usually has six strings, although variations exist with four, seven, or more strings. The strings are played by plucking or strumming with fingers or a pick, producing sound through vibrations that resonate in the body of the instrument. Guitars are widely used in various music genres, including rock, jazz, blues, and classical. They can be classified into two main types: acoustic guitars, which produce sound naturally, and electric guitars, which require an amplifier to enhance their sound.