Informativeness refers to the degree to which information conveys meaningful, relevant, and useful content to a user within a given context. In the domain of informetrics and scientometrics, informativeness is closely associated with the measurement of information value, its effectiveness in communication, and its contribution to knowledge generation and dissemination. It is not merely the quantity of information that matters, but the quality, clarity, novelty, and relevance of that information in satisfying user needs. Informativeness thus becomes a critical parameter in evaluating documents, databases, and information systems. In library and information work, informativeness plays a central role in collection development. Librarians must ensure that the materials selected are rich in content, up-to-date, and aligned with the informational requirements of users. The concept helps in assessing whether a document provides new insights or merely repeats already available knowledge. Highly informative resources are prioritized as they enhance the intellectual value of the collection and support research and learning more effectively. In cataloguing and classification, informativeness influences the way bibliographic records are created. Detailed and accurate metadata enhances the informativeness of catalog entries, enabling users to retrieve relevant information efficiently. Subject headings, abstracts, and keywords are designed to maximize informativeness by clearly representing the content