There are many correct answers to this question, as there are many differences between mass and weight. Many people have the tendency to use these words interchangeably, but they mean different things. At rest on Earth, the mass and weight are the same. However, at a different location, the weight would change, but the mass would not. If the gravity gets higher, the weight will increase. If gravity lowers, the weight will decrease.
Regardless of the gravity, the mass will not change. Another difference between them is that weight can be zero, but the mass will never be zero. Along with that, they are measured differently. Mass can be measured in kilograms or grams, while weight is measured in newtons.
Mass is anything that takes up space or in other words it is matter that usually does not have a shape to it, but is usually large. Weight is how many pounds something is. Even though there is a relationship between these two words, there is a great difference between mass and weight. Mass deals with the amount of matter something has. Weight on the other hand, is how much gravity brings down that matter.
Both are a measure of something. If someone wants to know how many pounds they are, they would get on a scale and see how much they weigh. Rarely would someone determine how much mass they are. Although, people do measure their body mass using a body mass index.