Islamic economical jurisprudence is a fancy way of saying that there are rules in Islam about how money can be used and earned. Just like how your mom and dad might have rules about how you use your allowances or how you earn your money (like doing chores), Islam also has rules about money.
For example, in Islam, you can't make money in ways that harm others, like cheating or stealing. It's also important to give a portion of your income to those in need (called charity or zakat). This helps to make sure that everyone has what they need to live a decent life.
Additionally, there are rules about borrowing and lending money. In Islam, it is encouraged to help others out by lending them money when they need it, but it is also important to make sure that you get your money back.
Overall, Islamic economical jurisprudence guides Muslims on how to make and use money in ways that are fair, just, and helpful to everyone in society.