Retrieval-Augmented Generation (RAG) is a technique designed to address the limitations of large language models (LLMs) by combining their generative capabilities with a retrieval mechanism that accesses external reputable sources, thereby reducing hallucinations and providing more accurate and up-to-date responses. Introduced by Facebook AI researchers in 2020, RAG enhances a model's contextual understanding by retrieving relevant information at runtime and injecting it into the prompt, allowing LLMs to produce context-aware answers tailored to specific queries. This approach is particularly beneficial for voice-first platforms, such as meeting assistants and contact centers, as it offers real-time domain-specific knowledge that improves customer satisfaction and operational efficiency. While RAG offers advantages over traditional fine-tuning by not altering the model's internal parameters and avoiding catastrophic forgetting, it also presents challenges such as data privacy, security risks, and information overflow, which need to be managed with encryption protocols and curated datasets. Gladia, a company specializing in speech-to-text and audio intelligence APIs, utilizes RAG to make their products more robust and reliable, showcasing its potential in enhancing the quality of outputs and contextual understanding in AI-driven applications.