Muhtasibat is a word that comes from Arabic and it means "market inspection" or "market regulation". In very simple terms, it means that there are people whose job is to make sure that everything that is sold in the market is safe to use and fair for everyone to buy.
Muhtasibat is a very important thing because it helps keep people safe from things that could be harmful to them. For example, if a product is expired, muhtasibat would not allow it to be sold because it could make someone sick. Also, if someone is selling a product that is not what they say it is (like selling fake medicine), muhtasibat would make sure that they stop doing that so that people don't get hurt or tricked.
So, basically, muhtasibat is like having someone who makes sure that everyone plays by the rules of the market and that everything is safe and fair.