The phrase "better aero" refers to improving the aerodynamics of something. It means making the object or vehicle more streamlined and efficient in moving through the air. Full definition
At the rear, there's an aluminum tailgate with a spoiler for better aero, a high - mounted handle borrowed from the F - 150 and a frame - mounted steel bumper. (cnet.com)
Good aero balance is key for this corner but it is very hard on the tires. (corvetteracing.com)
The current Civic Type R has a drag coefficient of 0.26, so this car should have some pretty good aero despite the normalized look. (cheersandgears.com)