Sagot :
The introduction to a formal document that explains its purpose.b. A statement accompanying a law or regulation specifying its purpose or reason for enactment.
Preamble is like the significance or the purpose of the research. But in preamble, it's all about the introductory of a document as to why this document is made, what's the purpose. It may also recite historical facts or some related studies pertinent to the subject of the statute.