Google Voice is a telecommunications service launched by Google in 2009 that allows users to make calls and send texts from existing phone numbers or new Google numbers for free within the US and Canada. It offers features like voicemail transcription, call recording, call blocking, and conference calling. While it faces challenges from competitors and phone companies, Google Voice is seen as having potential for success due to its cost savings and managerial benefits. However, some view its invite-only status and recording of calls as potential limitations.