A mobile hotspot is a portable device or feature on a smartphone that provides internet access to other devices using cellular data. It creates a small Wi-Fi network, allowing laptops, tablets, and other smartphones to connect to the internet when traditional Wi-Fi is unavailable. Mobile hotspots are useful for people on the go, such as travelers or remote workers. They can be standalone devices or built into smartphones, making it easy to share internet access with multiple devices. Users should be aware of their data limits to avoid extra charges from their cellular provider, such as Verizon or AT&T.