Microsoft Copilot is an AI-powered assistant integrated throughout the Microsoft ecosystem—Bing, Edge, Windows, Microsoft 365, and standalone apps on Android and iOS. Originally launched as Bing Chat in early 2023 and rebranded to Copilot, it brings advanced GPT‑4‑based capabilities tailored by Microsoft to transform how users create and interact with content. Copilot helps draft documents, summarize email threads, analyze data in Excel, generate presentations, and even craft images with Designer’s Image Creator. The service offers diverse conversation modes—Quick for rapid responses, Think Deeper for more complex reasoning, and Deep Research for thorough investigations. With Copilot Voice and Vision features, users can speak to the assistant or have it analyze what's on their screen, making interactions more natural and context-aware. Copilot Pages and Conversation History facilitate content creation and revisits across sessions. Available via Copilot Labs, early adopters can access experimental features like Think Deeper and Vision. It supports multilingual communication and offers extensibility via plugins (e.g., Instacart, Kayak, Suno AI). As a foundational layer in Microsoft’s AI strategy, Copilot powers productivity across Windows, Edge, 365 apps, OneDrive, and continues to expand as a central AI-first companion.