Final answer:
Tethering software allows a device to share its internet connection with other devices by creating a wireless hotspot. Commonly used in smartphones and tablets, this feature turns the device into a portable router.
Step-by-step explanation:
Tethering software is software that takes an existing internet connection and turns it into a wireless hotspot. This allows other devices to connect to the internet through that hotspot. The most common example of this software is the tethering feature built into many smartphones and tablets. With this feature enabled, these devices can share their cellular data connection with a computer, tablet, or other smartphones, effectively turning the device into a portable router.