From what i've heard quads equal to studs. What if someone made a map into multiple pieces?
A quad is a face.
A quad is also a 4 sided 2 dimensional shape
A 1x1 brick will have 6 quads. top, bottom, front, back, left, and right.
A 1x2 brick will have 6 quads
A 64x cube will have 6 quads
A ramp (assuming it's in the same style as the defaults, stud backing with a tiny lift at the start of the ramp) will have 9 quads