Credit rating agencies (CRAs) evaluate the creditworthiness of debtors such as individuals, companies, and governments. They establish a link between risk and return, with higher rated debt having a lower risk of default. CRAs issue short-term and long-term ratings for corporate and sovereign debt. Their role is to maintain investor confidence, protect less knowledgeable investors, and provide transparency about borrowers' ability to repay debt. CRAs analyze financial and other data to assess default probability, though ratings are not guarantees of repayment and do not consider other investment risks. While useful, credit ratings also have limitations such as potential bias, subjectivity, and responsiveness to changing conditions.