The document provides information on audit definitions, objectives, types, process and best practices. It defines an audit as an unbiased assessment and verification of records and documents. The purpose of an audit is to determine the adequacy, compliance and effectiveness of a system or process. An audit involves systematically collecting objective evidence, checking it against audit criteria, and reporting any findings or non-conformances. It also outlines the roles of the client and auditor and the typical audit activities from planning to reporting.