Google Voice is a telecommunication service provided by Google that allows users to make and receive calls, send text messages, and manage voicemail through a single virtual phone number. It works across multiple devices, including smartphones, tablets, and computers, and integrates with other Google services like Gmail and Google Meet. Google Voice offers features like call forwarding, spam filtering, voicemail transcription, and international calling at competitive rates. It is widely used for personal and business communication, providing flexibility and convenience.