Bodily injury liability coverage generally pays damages for bodily injuries to the driver and passengers of the other vehicle when you are responsible for an accident. It also provides coverage to defend you if you are sued because of an auto accident.
Property damage liability coverage generally pays for damages to another person's property (e.g. their car) when you are responsible for an accident. It also provides coverage to defend you if you are sued because of an auto accident.
Medical payments coverage generally covers you, household relatives and your passengers for medical expenses that result from injuries sustained in an auto accident. It also covers you as a pedestrian if you are hit by a vehicle.
Some states have personal injury protection (PIP) in place of, or in addition to, medical payments coverage. This is also known as no-fault coverage. PIP can generally pay for medical expenses, funeral expenses, loss of income and other expenses for injuries or death due to bodily injury sustained as the result of a car accident.
Uninsured or underinsured motorist bodily injury coverage generally pays for damages for bodily injury to you and your passengers when caused by another in an auto accident and the person legally responsible either has inadequate or no insurance. This coverage varies greatly by state. In some states it may be a combined coverage, while other states may offer it as two separate coverages (e.g. one for uninsured motorists and one for underinsured motorists).
Collision coverage generally pays for damage to your car if it hits another car, object, or overturns. A deductible applies to this coverage.
Comprehensive coverage generally pays for damage to your car if it is stolen or damaged by certain causes other than collision, such as fire, theft, hail or vandalism. A deductible applies to this coverage.
Source: travelers.com