I have just received an email from Google wherein they are asking for my physical address so that I can continue to use my Google Wallet account. This is strange since I have never used Google Wallet. What will happen if I don't supply the address?
I have no idea what Google Wallet is because I only use Gmail, Google App Engine API, Google Docs, and a Google account to sign into StackExchange websites.
What is the purpose of Google Wallet and what does it have to do with email, GAE API, Docs, and auto-signing in?