An OTG (On-The-Go) adapter is a compact device that allows a smartphone or tablet to act as a host, enabling it to connect with USB peripherals like flash drives, keyboards, mice, and game controllers. Typically featuring a micro-USB or USB-C connector on one end and a standard USB-A port on the other, the OTG adapter bridges the gap between mobile devices and external hardware. It’s widely used for transferring files, backing up data, or expanding functionality without needing a computer. This makes the OTG adapter a convenient and versatile tool for enhancing mobile productivity.