How do you set up wifi?

I have Century Link. The wi fi number is on the bottom of the box/router that connects to my computer. It is next to "Keypassphase" the last 4 numbers usually works. You go to Internet on the tablet and put in the number..usually 4 digits. It searches for your number and tells you it is all set. You can shut off wi fi or leave it on (green light) when you are using the tablet, depends on what you are doing. You use less battery when it is off when playing a game but you can't play with other people unless you are on line.
Hope this helps a bit. Best to talk to your telephone/computer company.