This report examines the principles of disclosure in financial reporting, focusing on the International Accounting Standards Board's (IASB) efforts to improve communication within financial statements. It addresses the 'disclosure problem,' which encompasses a lack of relevant information, an excess of irrelevant information, and ineffective communication. The report details IASB's initiatives, including amendments to IAS 1 (Presentation of Financial Statements) and IAS 7 (Statement of Cash Flows), as well as the publication of IFRS Practice Statement 2. It explores the concept of materiality, its qualitative and quantitative aspects, and its impact on information presentation and disclosure. The report also discusses issues related to the content and arrangement of primary financial statements, and how IASB has responded to these concerns through the use of primary financial reports and performance measures. This report provides a comprehensive overview of the IASB's actions to enhance the clarity, relevance, and effectiveness of financial reporting.