Indexing is a process used in research to classify and organize information in a systematic way, making it easier for researchers to search for and retrieve relevant content. Indexing involves the assignment of keywords, subject headings, or metadata to documents or sources of information, allowing them to be easily located within a database or information system. Indexing helps researchers efficiently navigate through vast amounts of information, enabling them to find relevant resources quickly and effectively. It plays a crucial role in information retrieval and knowledge organization in various fields such as library science, information science, and academic research.