None, an extender will make your lag worse and speeds lower. Also try changing channels and using 5 GHz if you can. If you are on 2.4 GHz there is often interference which causes lag.

Does WiFi repeater cause lag?

A WiFi extender connects to your network through a wired connection. ... WiFi extenders are the best option for extending your wireless connection to problem areas in your home or office. With a strong, wired connection, you get lightning fast speeds without worrying about lag or an intermittent signal.

Is a WiFi extender bad for gaming?

the main issue with using a wi-fi extender is it will increase the time between getting from yout PC to the game server, not much, just a few hundredths of a second, but enough to hurt at top competive levels. otherwise, any extender will work fine.