What is the name of Google's VOIP service that provides a phone number?

Google's VoIP service that provides a phone number is Google Voice.

Google Voice gives eligible users a Google-managed telephone number for calling, texting, voicemail, and call forwarding. Incoming calls can ring multiple configured phones or devices, while voicemail messages can be accessed through the web and mobile applications. The service also became known for features such as voicemail transcription, call screening, number blocking, and searchable call history.

Google launched Google Voice on March 11, 2009, building it on technology and features from GrandCentral, a telephone service Google acquired in 2007. It initially combined internet-based account management with calls routed through the public telephone network; later versions added fuller VoIP calling through the web and apps.

Google Voice is often confused with Google Meet, which is primarily a video-conferencing service, or Google Fi, a mobile wireless service. Google Voice is centered on a virtual phone number and cloud-based call management.