A contractual brief is a legal document between a client and employee that outlines the specific time scale, price, and task. It provides advantages like being legally binding so either party can take action if the terms are not followed. However, it must be read thoroughly to understand what is being agreed to due to its specificity and potential legal implications. A formal brief only provides key information while an informal brief has no binding documents and allows more creative freedom but lacks protections. It is important to thoroughly read any brief to understand client expectations and gauge what is required to meet their needs and standards.