Summarize the following:
Your feet should be together. Pop your right foot up slightly, but keep the ball of your foot on the floor. Lower your right heel to the floor as your raise your left foot up. Then lower your left heel to the floor and raise your right heel. Repeat once more on the right side. The rhythm of this step is the "cha cha cha" that gives the dance its name. It should take two beats of whatever song you're dancing to. You should end with your right heel on the floor and your left heel lifted off the floor slightly, resting on the ball of your foot. This triple step is one of the most basic cha cha steps, so it's important that you practice it. Don't take a huge step your left foot should only extend about a foot in front of you. As you step forward, your right heel should come up off the floor as you rock onto the ball of your right foot. This step should happen on the third beat of the song. The rocking step should be pretty smooth. Both of your feet should always be partially touching the floor as you transfer your weight from one foot to the other. Rock your right foot back so that your heel is on the floor again. As you do this, bring your left foot back to meet your right foot in the starting position. This step should happen on the fourth beat of whatever song you're dancing to. Once you replace your left foot, repeat the triple step, beginning with your left foot this time. Extend your right leg back so that the ball of your foot touches the floor. As your rock backward and your right heel takes your weight, lift your left foot up so that the ball of your foot comes off the floor and your heel stays in place. Then rock back onto your left foot and bring your right leg back to starting position.

Summary:
Start with a triple step. Take a rock step forward with your left foot. Perform a rock step from your right to left foot. Repeat the triple step. Rock step backward with your right foot.