When you rent a car, the company almost always tries to add additional rental car fees, including offering supplemental coverage that costs extra. When you get to that stage of the booking process, you're probably wondering if it would be irresponsible of you to decline to save a few bucks.
The good news is that the answer is probably no. Most people can safely decline the added coverage. Technically, what rental car companies are offering you is usually not insurance, but a waiver. Basically, for a fee, you can waive responsibility for damage to the rental car while you have it.