What are the different types of checks and how can they be used for financial transactions?

The main types of checks are personal checks, cashier's checks, and certified checks. Personal checks are written by individuals to pay for goods or services. Cashier's checks are issued by banks and are guaranteed by the bank. Certified checks are personal checks that have been verified by the bank. Checks can be used for financial transactions by providing a secure and convenient way to transfer money from one party to another.