A guitar pick, also known as a plectrum, is a small, flat tool used to strum or pluck the strings of a guitar. Typically made from materials like plastic, metal, or wood, guitar picks come in various shapes, sizes, and thicknesses. The choice of pick can affect the sound produced, as thicker picks generally provide a sharper tone, while thinner picks offer a softer sound. Guitar picks are held between the thumb and index finger, allowing musicians to play chords and melodies with precision. Many guitarists have personal preferences for specific picks, often experimenting to find the one that best suits their playing style and musical genre.