Wind turbines is like big pinwheels that grabs the wind and make it into power. When talking about a "efficient" wind turbine, it mean one that do good job catching most wind energy and turn it to useful electricity. Like a strong fan that don't waste nothing. For big companys needing lots of power, efficient ones is important because they get more energy for money and help earth too. Not just big blades, but smart design and all parts work together. Like race car, not only big motor but everything fit perfect to go fast. We at windfull know making our turbines most good they can is key for costumers.