Business law is the set of rules that companies (like a store or a factory) and people who work in them (like the owner or employees) have to follow when doing their work. Just like you have rules at home, like not writing on the walls, companies have rules they have to follow too.
These rules can include things like how to create contracts (an agreement between two people or companies), how to keep track of money and taxes, and how to make sure that everyone is safe at work.
Sometimes, things can go wrong when people or companies don’t follow these rules. For example, someone might not pay for something they bought, or a company might not follow safety rules and someone could get hurt. When things go wrong like this, there are even more rules that say what people or companies can do to try to fix the problem.
So business law is like a rulebook that tells companies and the people who work for them how to do things the right way and what they should do if things go wrong.