An Informal Brief is an informal document which is used to provide general information to the reader. It is typically less comprehensive than a formal brief, and is usually used to provide an overview of a situation or topic. It is commonly used in business or educational settings. There are two main types of Informal Briefs. The first type is a summarizing brief, which is used to provide an overview of an issue or situation in a concise format. The second type is an explanatory brief, which is used to provide more detailed information and explanations about a topic or issue.