Gemini Multimodal Live + WebRTC is a sample project demonstrating how to build simple voice AI applications using the Gemini multimodal live streaming API and WebRTC technology. Major advantages of this product include low latency, improved robustness, ease of implementing core features, and compatibility with various platforms and language SDKs. The background information indicates that this is an open-source project aimed at enhancing the performance of real-time media connections through WebRTC technology while simplifying the development process.