Okay kiddo, have you ever seen someone playing the guitar and just using their fingers without pressing any of the strings down with another finger or placing their finger on a metal bar on the guitar that changes the pitch of the sound? Well, that is called an "open chord".
An open chord is like creating a musical sound by just pressing some strings, and not others, without using any fingers or metal bars on the guitar. It's like creating a special sound with the guitar strings in a very simple way.
Basically, when you play an open chord on the guitar, you're playing some strings without stopping them with your fingers, but you still get a nice, musical sound out of them. It's like magic! But it's actually just science: the strings vibrate and produce a sound that you can hear.
So, if you ever want to learn how to play guitar, try starting with the open chords first! It's a good way to get familiar with the guitar and how it works.