system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The difference between mass and weight

Edit: Thanks for the answers, everyone!
gpt
Your mass is a given quantity regardless of where you are. Its how much "stuff" you are made of. Weight is how gravity acts on your mass so you weigh less on the moon because there is less gravity but your mass is the same anywhere you go in the universe.