Wi-Fi is a wireless network that follows specific 802.11 IEEE standards and protocols used for Local Area Network [LAN] devices and internet access allowing the exchange of encrypted data via radio waves.
The standard home equipment required is a Wireless Router. It uses a Service Set Identifier [SSID] to identify your collection of networked devices. This would be considered your ‘wifi network’ that you choose when connecting to your wifi.
You need to access your router’s admin management page in order to configure your wireless router with a new password instead of the default 0000 or 12345, and an SSID name instead of the generic SSID name it comes with.
Best Practices are to use a leeted passphrase, and to not broadcast your SSID to the public.