Kurt Lewin originally developed the concept of gatekeeping theory to describe how information is filtered for dissemination through various channels of communication. Gatekeeping refers to the process by which individuals or organizations make decisions about allowing or blocking information to pass through different gates. At each gate, a gatekeeper determines what information is appropriate or inappropriate to pass through based on various influences like social norms, ethics, and policies. Gatekeeping theory is now widely used in fields like journalism and mass media to understand how and why certain information gets selected for publication or broadcasting while other information gets rejected.