What is the purpose of a preamble in a document?

The purpose of a preamble in a document is to provide an introduction that clearly states the aims and purposes of the document. It sets the stage for the content that follows, offering a concise overview of the intentions behind the text. In the case of foundational texts, such as the Constitution, the preamble articulates the principles and values that guide the document's provisions, establishing a framework that informs the reader of its objectives and significance. By doing so, it creates context and allows the audience to understand the motivations and necessary goals that the document seeks to achieve. This introductory element is critical as it helps readers grasp the document's essence before delving into more detailed sections.