Microsoft SharePoint Designer (SPD) has come through several version changes over the past couple of years, the current being Microsoft Office SharePoint Designer 2007. The SPD is a set of tools to enable your personal or corporate applications to run over the SharePoint Server platform. As much as we would like to call it something more elaborate and sophisticated than it really is, the SPD is really just an HTML editor which can be used for multiple office based work flows to create SharePoint portals that cater for specific business requirements. For example it allows you to automate process flows and implement standards, establish document approval/rejection, track and monitor schedules, events, contacts, discussions or create document templates on which end users and administrators can use the SharePoint portal in the appropriate manner, using ONLY the standard documents, policies and work flows you set out.
SPD uses the same rendering engine as Expression Web and Visual Studio IDE to build pages in .Net format, and incorporates considerable flexibility for designers to setup a resilient administrative system of controls, menus, warnings and notifications, download features and CSS style sheets. All via a ‘what you see is what you get’ (WYSIWYG) front-end editor.