Proactive Voice allows you to proactively call your Customers (in bulk) to communicate a voice message without an Agent (or many Agent dialers) having to reach out to Customers one at a time. Customers receive an automated call and can even leave a voicemail if they don't pick up. If they answer, they'll hear your message, and you can even give them the option to speak to an Agent if they want more information.
See Get Started With Proactive Conversations for information about the benefits and reasons for using Proactive Voice and a list of common use cases.