A more thorough explanation:

An official report is a formal presentation of facts or a recommendation for action. It can be presented orally or in writing. There are different types of official reports, including:

• Committee report: A report from a committee to a deliberative assembly on business referred to the committee or on a matter otherwise under its charge.
• Informational report: A report without a recommendation for action.
• Officer's report: A report from an officer to an organization or deliberative assembly on business relating to the officer's duties or on a matter otherwise under the officer's charge.
• Report with recommendation: A report accompanied by a recommendation for action.

Official reports can also refer to written accounts of court proceedings and judicial decisions. These reports are published in volumes of judicial decisions by a particular court or group of courts. They can be either official (published by a government entity) or unofficial (published by a private publisher).

For example, a committee report can be presented to a board of directors to provide information and recommendations on a specific issue. An officer's report can be presented by a company's CEO to shareholders at an annual meeting to update them on the company's performance. A court report can be published in a volume of judicial decisions to provide legal professionals with information on past cases and decisions.