A Wi-Fi modem is a device that connects your home or office to the internet. It converts digital data from your internet service provider (ISP) into a signal that your devices can use. This allows you to access the internet wirelessly through Wi-Fi. In addition to providing internet access, many Wi-Fi modems also include built-in routers. This means they can distribute the internet connection to multiple devices, such as smartphones, tablets, and computers, without needing extra equipment. Overall, a Wi-Fi modem is essential for modern internet connectivity.