Office 365 is a subscription-based service offered by Microsoft that provides a suite of productivity applications and cloud services. It includes popular tools like Word, Excel, and PowerPoint, allowing users to create, edit, and collaborate on documents from anywhere with an internet connection. In addition to traditional desktop applications, Office 365 offers cloud storage through OneDrive and collaboration features via Teams. This integration enhances teamwork and accessibility, making it a preferred choice for businesses and individuals looking to improve their productivity and streamline workflows.