Cellular data refers to the wireless internet connection provided by mobile networks, allowing devices like smartphones and tablets to access the internet without needing Wi-Fi. It operates through a network of cell towers that transmit data to and from mobile devices, enabling activities such as browsing, streaming, and downloading. Users typically pay for cellular data through a monthly plan, which may include a set amount of data or unlimited access. Different mobile carriers offer various plans, and the speed and availability of cellular data can vary based on factors like location, network congestion, and the type of cellular technology used, such as 4G or 5G.