Controlled vocabulary is a standardized set of terms used to ensure consistency in the classification and retrieval of information. It helps organize data in databases, libraries, and information systems, making it easier for users to find relevant materials. By using specific terms, controlled vocabulary reduces ambiguity and improves communication among researchers and professionals. In fields like library science and information management, controlled vocabularies often include thesauri, taxonomies, or ontologies. These tools provide a clear framework for categorizing subjects, ensuring that similar concepts are grouped together. This systematic approach enhances search efficiency and accuracy, benefiting both users and information providers.