Barbell deadlifts are a classic heavy weighted move that works the gluteus maximus and the hamstrings, while also strengthening grip and the muscles of the lower back as they hold your core tight and safe. The best way to learn this exercise is to watch the short video, since the deadlift causes a lot of leverage into the lower back.
If you are new to the deadlift, practice for a few weeks with only a 10-pound plate on either side of the bar until you have figured out how to keep your hips high while simultaneously maintaining a straight lower back and tightening the upper back.