A Capo (short for the Italian word “capotasto”, which means head of the fretboard) is device that allows you to raise the pitch of a stringed instrument. If you put a Capo on at the 1st Fret then the key of E become the Key of F. Throw a capon on at the 4th Fret and the key of G become the key of B.
The joke is that worship leaders tend to use them so they can play “in G” no matter what key they are really playing in. There is some truth to that however. Let’s look at why Capo’s are used. What there Pros are. What their challenges are. Lastly we’ll look at what their drawbacks are.