This document discusses auditing fundamentals for second level auditing. It defines auditing as assessing an organization's compliance with financial, operational, and strategic goals as well as regulatory requirements. The document outlines the main types of auditing as internal, external, financial, and strategic/operational/IT auditing. It also discusses the principles of auditing including integrity, independence, documentation, and audit conclusions. Benefits of auditing include assurance for owners and detecting errors and fraud, while disadvantages include costs and time required.