Cellular refers to anything related to cells, which are the basic building blocks of all living organisms. Cells perform essential functions, such as energy production, growth, and reproduction. They can be classified into two main types: prokaryotic cells, which lack a nucleus, and eukaryotic cells, which have a defined nucleus and organelles. In technology, "cellular" often describes mobile communication systems that use a network of cell towers to transmit signals. These systems allow for wireless communication over long distances, enabling devices like smartphones to connect to the internet and make calls. Cellular technology has evolved significantly, leading to faster data speeds and improved connectivity.