Mobile learning is defined as learning across contexts using personal electronic devices. It allows for instant sharing and feedback anywhere through handheld devices like phones and tablets. Mobile learning enhances student-centered learning and collaboration by replacing textbooks and facilitating online interactions between teachers and students. While it provides benefits like low-cost continuous learning support, mobile learning also faces challenges with connectivity, device limitations, and potential distractions. It represents an evolution of computer-assisted instruction through universal accessibility and easy content updating.