What is high-level overview?

A high-level overview is a brief summary or broad outline of a subject or system, usually presented at a high-level of abstraction to provide a general understanding of the subject or system without getting into the specific details. It typically gives a holistic view of the subject, rather than focusing on specific details or components. High-level overviews are often used to set context or introduce a subject, and are commonly used in business presentations, project management, software development, and other areas requiring an introduction or general understanding of a subject.