Yes, Liberty Mutual offers discounts on defensive driving courses, but only in states that legally require it. Thirty-four states and the District of Columbia require insurance companies to offer defensive driving discounts to eligible drivers, although the exact amounts and requirements of the discount vary. You can get a discount for driving defensively on car insurance if you complete an approved driver education course. Liberty Mutual also offers a good discount for drivers who don't have accidents, so learning more about safe driving could help you save in the long run.
By attending traffic school, you can learn how to better avoid accidents and traffic violations by the at-fault party, which would increase your Liberty Mutual premium. If Liberty Mutual doesn't offer a discount for driving defensively in your state, you should still consider taking a course.