What does the on-board instrument mean by showing ECO?

That is, the on-board ecological, energy-saving and optimization functions, when the vehicle starts the eco energy-saving mode function, the vehicle will save you about 6% fuel consumption; At this time, the automatic functions on the vehicle will be automatically recognized by the computer, such as automatic air conditioning, automatic start and stop, engine speed and power output will be automatically recognized by the computer and adjusted according to the actual situation, and finally the actual fuel saving purpose will be achieved.