In the United States, all states require teenage drivers to be insured. The specific requirements vary from state to state, but in general, teenage drivers must have liability insurance, which covers damage to other people's property and injuries caused by the teenage driver. Some states also require teenage drivers to have collision and comprehensive insurance, which covers damage to the teenage driver's own car.
The goal of these laws is to protect both teenage drivers and the public from financial liability in the event of an accident. Teenage drivers are statistically more likely to be involved in accidents than more experienced drivers, so requiring them to be insured helps to ensure that there is financial protection in place in the event that they cause damage or injuries.