This document provides an overview of credit ratings and rating agencies. It discusses that credit ratings are issued by rating agencies and represent their opinion on the likelihood that a debt issuer will repay their obligations. The major international rating agencies are Standard & Poor's, Moody's, and Fitch which provide ratings for bonds, commercial paper, and other debt instruments issued by public and private entities. In India, the major national rating agencies are CRISIL, ICRA, CARE, SMERA, and ONICRA which provide similar ratings for Indian debt issuers. The document outlines the various types of ratings provided and factors analyzed in the ratings process.