WiFi allows your device (i.e. laptop or PC or Mobile) to be connected to the internet without requiring to be plugged in while you surf the Web. WiFi uses a device called a wireless router to spread the wireless Internet signal throughout your home or office so that you can connect to it with your devices. To use WiFi, your device needs to be WiFi capable. Most laptops, smartphones, tablets, e-readers, and other devices you might take outside of the house are WiFi-ready by default. Desktop computers are often not set up to connect to WiFi by default. what is wlan