This document provides an overview and lesson on using Excel Services to share Excel spreadsheets on a Microsoft SharePoint site. The first part introduces Excel Services and how it allows multiple people to access and view an Excel spreadsheet using a web browser. It describes publishing a workbook to a SharePoint document library so others can view it. The lesson then demonstrates how to publish a workbook and how users can view the published workbook in Excel Services to access the data without needing Excel installed. It also discusses permissions and preventing editing of the published workbook.