Ledger entries are records of financial transactions that are used to track the flow of money in a business. They include debits (DR), credits (CR), debts (DEBT) and postings (POSTING). Debits are entries that record an increase in an asset or expense account, while credits are entries that record a decrease in an asset or expense account. Debts are liabilities that must be paid back, while postings are the actual entries made into the ledger.