Microsoft Copilot is Microsoft's AI assistant powered by GPT-4 that is deeply integrated across the Microsoft 365 ecosystem — including Word, Excel, PowerPoint, Outlook, and Teams. It can draft documents, analyze data with natural language, create presentations from briefs, summarize email threads, generate meeting notes, and perform complex data analysis in Excel using simple instructions. With billions of Office users worldwide, Microsoft Copilot represents one of the largest AI deployments in history, bringing AI assistance to everyday productivity tasks for enterprise employees who already spend their working days within the Microsoft 365 environment.