Changing lanes is an important skill to master for the driving exam. To do it successfully, signal your intention to change lanes, check your mirrors and blind spots, and look over your shoulder to ensure it's safe. Avoid sudden movements and always maintain a steady speed while changing lanes. Make sure to check for other vehicles, use your turn signal, and smoothly merge into the desired lane. Practice changing lanes in different traffic situations to enhance your skills. Remember, safety should always be your top priority.