PC World: “A Wi-Fi extender is a gadget that sucks in Wi-Fi signal, then spits it back out on the same network name and frequency. Think of it as a radio repeater, because that’s essentially what it is. It’s a relatively easy and inexpensive way to extend your network into those hard-to-reach spots in your home, and much less expensive than a full mesh system. But setting it up isn’t always straightforward. Here are some basic tips on how to get started, and how to make the most of these handy devices…”