You control the program using your mouse or the toolbar. You'll see the positions and names of the planets, nebulas, constellations, and stars that appear in your sky.
You can set it to show a certain time of day and even simulate eclipses. You'll also have the ability to take screen captures and video recordings of your interstellar journeys to show to your friends and family.
All of this makes Stellarium a very intriguing astronomy application.