Wax used on vehicles can either be natural or synthetic. Some products are extracted from plants or other naturally found materials like coal, and others are made in factories. Whichever type you might use, you'll be giving your vehicle a way to repel water and keep other potentially harmful particles from collecting on it.
To make it easier to spread wax, most of the car waxes contain additional elements such as solvents or oils. This makes them softer, and you could either have a professional apply it or do it yourself at home.