A business case is a document that outlines the reasons for undertaking a particular project or initiative. It typically includes a description of the problem that the project is intended to solve, the benefits that are expected to be achieved, and the costs and risks associated with the project.
Business cases are important because they help decision-makers to understand the potential value of a project and to make informed decisions about whether or not to proceed with it. They can also be used to track the progress of a project and to ensure that it is meeting its objectives.