Too many people using my wifi can play games on my ps4 how do i fix this?

If it is "Your wifi" then it is your router, put a password on your router. That way only people with the password can use it. Or, when your using your ps4, only allow your ps4 to connect. There should be a guide inside your routers box, or on it. Otherwise you'll have to go the routers brands website.

You can cut them off.

Another option is to upgrade to more bandwidth, get a better cable modem. If it's g, might want to upgrade to n. And when ac becomes available, get an ac cable modem wifi router.

Buy a powerline adapter its the best way to help with your problem but they will still use your bandwidth which will still slow u down http://www.newegg.com/Product/Product.aspx?Item=N8...