Why Companies Required to follow IAS(International Accounting Standards) and IFRS(International Financial Reporting Standards)?

In order to make the financial reports "standardized" around the globe, which makes the understanding, comparison and valuation of companies easier and realistic.

Because they are the framework that identify to us what transactions must be reported , when must be reported , and in which value . All companies must follow them , so they provide to us a uniform for any accounting treatment,