It is recommended to place the WiFi repeater within range of the existing WiFi network to ensure a strong signal. Keep it in a location where the signal from the main router is still strong: ideally, a location halfway between your router and your computer (or desired area) that has a direct view of the original router. It's worth bearing in mind that concrete walls will get in the way of a strong connection, so if you have these in your house you might want to consider going for a wired instead of wireless option.