Tubeless tyres are those which do not require a separate inner tube unlike tubed tyres.
Advantages of tubeless tyres are :_
1.) In case of puncture , the air leakage is very slower. As the air can leak only through the point of puncture, it gives sufficient time to the driver to control the vehicle.
2.) Better fuel efficiency , because of the light weight due to the absence of the tube.
3.) No tube related problems.
4.) Less chance of damage in case of flat running , because no air instant loss.