We audit the government's financial statements and compare them to generally accepted accounting principles that are applied to the public sector. We look to ensure that they are fairly stated and that they are free of errors that would impact the user's decision. A clean opinion basically means that you can rely on the information in the financial statements.
It is something that very few countries can say they receive, so Canada and all of the departments and agencies and Crowns that are involved in the development of these statements should be proud of that.