Tethering is a process that allows a mobile device, like a smartphone, to share its internet connection with other devices, such as laptops or tablets. This can be done through various methods, including Wi-Fi, Bluetooth, or a USB cable. Tethering is useful when there is no available Wi-Fi network, enabling users to access the internet on multiple devices using their mobile data. When using tethering, the mobile device acts as a hotspot, providing internet access to connected devices. However, it's important to monitor data usage, as tethering can quickly consume mobile data limits. Many mobile carriers have specific plans or restrictions regarding tethering, so users should check their agreements.