I am trying to get wif on my samsung galaxy it tells me get guest password can you help

You would need to refer to your Belkin's instruction manual for how to set up WiFi on it. The password for any WiFi hot spot is unique to that hot spot so there is no general 'guest' password per se - it depends on how you setup the WiFi router.

WiFi routers also have a web-based interface where you can open a browser from a connected PC and manage the device. Again, the device's instruction manual will tell you how to do this.

If the router was supplied by your internet service provider you should be able to call them for help.