If you're going to hit the road in Euro Truck Simulator 2, it is your goal to bring your load from point A to point B. Every time you deliver a load, you gain experience. The more experience you get, the more your level will rise! When you reach a higher level, you receive points that you can use for skills and/or specialize in special loads.
Those special roads include: ADR, heavy load, fragile loads and long distances. This screen will give you a nice example!