What is a Scale and What is it Measuring?

I found this video quite funny. 

So does a scale measure weight? No! A scale is used to measure the amount of force you are pushing on the scale due to the amount of force you are pulling on Earth. Although your mass should be in Newtons, it is is pounds because you divide your weight in Newton's by 9.8 m/s2 because of acceleration. 

Here's a cool article that explains the difference between weight and mass:

http://www.mathsisfun.com/measure/weight-mass.html