It sounds like you are confusing an Access Point with a Webserver. If you want the page to be available on your normal WiFi network then try WifiS3 -> SimpleWebSeverWiFi.ino again.
Have you entered your WiFi Access point name and password into arduino_secrets.h and changed the baud rate of Serial.begin() if you don't want it to be 9600 ?
Uploading the sketch and resetting the board should output something like this in the Serial monitor
Attempting to connect to Network named: Your_Access_Point_Name
SSID: Your_Access_Point_Name
IP Address: 192.168.1.118
signal strength (RSSI):-42 dBm
To see this page in action, open a browser to http://192.168.1.118
Open the given IP address in your browser. What do you see ?