These kits are basically a combination of various items or tools that you keep in your car at all times. In the event of a problem, such as being stranded on the side of the road, you can turn to your kit to make the process of finding help more efficient. They generally include items like water, jumper cables, flashlights, road flares, and additional chargers for your mobile devices.
So do your due diligence and consider putting your own kit together. Because you never know when disaster will strike, and being prepared can make it less of a burden.