Remember what I said ?
The WifiS3 -> SimpleWebSeverWiFi example creates a webserver on your existing WiFi network, hence the need to enter your current WiFi SSID and password. The WifiS3 -> AP_SimpleWebServer example creates a new Access point that is not on your WiFi network and runs a webserver that you can access on that new Access Point. For this example you provide the SSID and password needed to access the new Access Point
If you want to use your current WiFi network to see data from the Arduino and also connect to other things on the network then use the first example but if you want to create a separate Access Point and webserver use the second example
To me the first option makes more sense as you cannot connect your PC/phone/tablet to more than one WiFi network at a time, at least not normally