A subsidiary account is an account that is connected to a controlling account within a subsidiary ledger. It offers a more detailed view of transactions within a specific category or subcategory. Commonly used for accounts like accounts receivable, accounts payable, and inventory, subsidiary accounts facilitate tracking of individual transactions, monitoring of balances, and generation of focused reports for improved analysis and management. By leveraging subsidiary accounts, businesses can enhance the accuracy and efficiency of financial record-keeping and reporting processes.