Scammer claiming to represent "google" advertising. This number is a FAKED/SPOOFED VoIP phone number and when called back it comes up as disconnected or no longer in service.
This is the famous "Be On The First Page of Google" scam. They claim to have some magic way to make your business or website show up first on Bing, Google or Yahoo - depending on who they are pretending to be today.
All they really want is access to your credit/debit or checking info so they can begin taking your money.
No legitimate business would call you and make your caller ID display a disconnected, no longer in service number. REAL businesses WANT you to contact them. They WANT your business.