It probably depends on the details. Are you going to travel for a few weeks at a time and return to the same permanent address in between? In that case, there's no need to update your address. If you won't have any access to your current address because you're selling your house, for example, you would need to update your address. Then you have to figure out where you are going to receive mail while you're travelling.
Thank you very much for your response. I realize I should have provided a bit more detail.
We are planning to travel until the approval, so we won’t have a constant address during this time and will not be returning to our previous address. If necessary I can provide the address of friends. However, I am a bit unclear about the reason for requesting an address, given that the application was done online and all communication so far has also been online.