Silverlight is used throughout the Office.com Web site and in online Office products. Installing now will give you the best Office experience.
Microsoft Silverlight is a program used to create, view, and interact with video and animation on the Web and on your desktop.
See system requirements.
How does Office use Silverlight?
Read the Silverlight enterprise deployment guide and learn how to deploy Silverlight in an enterprise network and improve the Office experience for your company’s employees.
See the Enterprise Deployment Guide (English).