Broadband wireless network connections (Wi-Fi) have a lower maximum bandwith capability compared to a physical ethernet connection (wired/cable).
The signal quality depends on your distance from the wireless router, as well as any other walls or objects in between. Also, sources of interference, such as a running microwave, could distrupt your signal.
For the best performance in running your high-load applications, such as a multiplayer online game, we recommend for you to use a physical, wired ethernet connection for the best performance.