Accounting standards and guidelines such as GAAP and IFRS provide the framework for how accounting events and financial statements should be recorded and reported. GAAP sets the standards for US accounting while IFRS is used internationally. Some key differences between GAAP and IFRS include their usage - GAAP in the US vs IFRS in over 120 countries, as well as their definitions of certain accounting concepts like what constitutes an asset. Both aim to ensure transparency and consistency in financial reporting.