Insurance is a written contract between an insurance company (insurer) and an individual or entity, where the insurer provides protection against financial losses. The insurance company can provide this protection by pooling risk from a large group of individuals and entities with similar needs.
Insurance is generally designed to protect you in the event of a loss you can’t otherwise pay for, such as totaling your car or requiring expensive surgery. If you don’t carry insurance, you may be 100% responsible for all related costs and expenses when an accident happens.
For a premium, the insurance company will reimburse you for losses should a covered contingency arise.
Let’s say you just bought a car and need to buy insurance, as required by your state. You and the insurance company would enter into a contractual agreement in which the insurance company agrees to protect your car against certain types of damage. Six months later, you are involved in an accident that damages your front fender. If your car insurance policy is active and the damage to your fender is covered, your insurer will pay to repair the damage up to the limits specified in the policy.