Cargo sampling is when we take a small part of a big group of stuff, like toys or clothes, to see if they are good or bad.
Like when you go to the store and your mom picks up an apple to see if it's fresh or rotten. She only needs to check one apple to decide if she wants to buy the whole bag.
Cargo sampling is like that. It helps people make sure things are good before they buy a lot of them. It's important because if something is bad, like if the toys are broken, people won't want to buy them.
So, cargo sampling is like a little test to make sure everything is good before we buy a lot of it.