​​What is the difference between Vehicle Curb weight (Kerb Weight) and Gross weight?

The curb weight of your vehicle is the weight of the car with all of the standard equipment and amenities, but without any passengers, cargo or any other separately loaded items in it. Thus, the curb weight is the amount that the vehicle weighs when it's resting on the curb and not in use. This is generally the standard weight that the manufacturer assigns to the car.
The gross vehicle weight is the combined weight of the vehicle and all passengers and cargo pieces in "gross," that is to say, in total. Gross vehicle weight is especially important if you're driving in a delicate area or if you're carry exceptionally heavy cargo. Gross vehicle weight is particularly important for truck drivers, who may be carrying huge quantities of cargo that might alter the total weight of the vehicle considerably.