In this lesson, the importance and use of analytical and other procedures in auditing are discussed. Ratio analysis is highlighted as a key method for performing analytical procedures, as it enables auditors to critically examine financial data and assess whether the data aligns with expectations. The lesson emphasizes the need to memorize and understand various financial ratios, as this knowledge will be invaluable across different parts of the CPA exams. Furthermore, familiarity with these ratios allows for critical thinking about their implications and possible indications of fraud or errors in financial statements. Memorizing and understanding these ratios not only assists in their application but also helps determine what each ratio conveys about a company's efficiency, liquidity, and solvency.