What does the 'iMessage' feature allow users to do?

The 'iMessage' feature enables users to send and receive messages over Wi-Fi or cellular data, which is a crucial aspect of its functionality. This feature allows for seamless communication regardless of the network availability, as long as the device is connected to either Wi-Fi or a cellular data network. iMessage supports rich media formats, including images, videos, stickers, and more, enhancing the messaging experience between Apple users.

The ability to utilize both Wi-Fi and cellular data for messaging is what distinguishes iMessage from traditional SMS/MMS, which can incur carrier charges and are limited to text and basic multimedia. By leveraging internet connectivity, iMessage provides a cost-effective and versatile messaging platform within Apple's ecosystem.