office.com/setup Microsoft Office is a complete package of apps and services developed by the tech giant Microsoft. It comes with apps such as Word, OneDrive, Access, Excel, PowerPoint, and OneNote. All apps have a different goal and come with several advanced features. To make your work easier, you need to download and install the Microsoft Office software. For activating the Office product, you have to enter the 25-digit alphanumeric product key by going to the office.com/setup.