A Wi-Fi extender is a device that helps improve the coverage of a wireless network. It works by receiving the existing Wi-Fi signal from a router and amplifying it, allowing the signal to reach areas in a home or office that may have weak or no connectivity. This is especially useful in larger spaces or buildings with thick walls. Setting up a Wi-Fi extender is usually straightforward. Users typically plug it into a power outlet within the range of their router, connect it to the network, and then place it in a location where they need better coverage. This helps ensure a more reliable internet connection throughout the area.