Rock stars make guitar playing look easy, but it takes a lot of technique and practice to make a guitar sing. As with any skill, you have to master the basics first. A guitar works by amplifying sound frequencies. The strings produce these frequencies, or tones, by vibrating.
The guitar has a long neck punctuated with metal bars called frets. Fretting is the action of pressing on strings close to the frets to change the tone. Thus, finger placement directly affects the sounds coming out of your instrument. Once you've watched this video to see fretting in action, click over to the next page and try your hand at chords.