If you find yourself needing to update your configuration because your WiFi has changed, follow the videos below for your operating system.
Paste the text in the box below into your file.
ctrl_interface=DIR=/var/run/wpa_supplicant
GROUP=netdev
update_config=1
country=COUNTRY
network={
ssid="SSID"
psk="PASSWORD"
key_mgmt=WPA-PSK
priority=1
}