In the context of mass communication, a cub refers to someone new, a beginner journalist, a novice.
Cubs are usually young reporters who are still learning the basics of news gathering, writing, and reporting.
The term is often informally used in a newsroom to describe interns, junior reporters, or recent graduates starting their careers in journalism.
Cubs are usually assigned simpler or less critical stories. They work under the supervision of experienced editors or reporters until they gain practical experience in news gathering or writing, interviewing, and fact-checking.
Naturally, cubs are expected to develop the skills and professionalism over time.