A mesh router spreads your Wi-Fi network out through multiple access points in the building.
Your mesh system will have a primary router and one or two additional access points (also called nodes, satellites, etc., depending on the brand).
Some routers may also have you set up and name your wireless network at this point, but many will wait until you are ready and your other access points are set up.
Plug in one access point in your desired location, wait for it to boot up, and follow your mesh router’s guideline for connecting it to your primary router.
Other mesh access points, like Netgear’s Orbi, may use LED lights to show that they are booting up, looking for the primary router, connecting, and successfully joining.