A guitar capo is a versatile accessory that attaches to the neck of a guitar, effectively shortening the playable length of the strings and raising their pitch. This allows musicians to change the key of a song without altering finger placements or chord shapes. Capos come in various styles, including trigger, clamp, and sliding designs, catering to different playing preferences and guitar types. They are typically made from materials like metal, plastic, or rubber, ensuring durability and a secure grip. Ideal for live performances, practice sessions, and songwriting, capos enable guitarists to explore new tonal possibilities and enhance their musical creativity.