These services will be available in the Services menu of all applications. They enable you to turn the dashboard off and on. Dashboard is, in fact, part of the dock application and Apple's dashboard.app (in Applications folder) merely shows the dashboard as opposed to launching or quitting it. Your open widgets still work when they are hidden and utilise memory / CPU. If your Mac is running slow you may wish to temporarily turn dashboard off in order to free up space, so use Turn Dashboard Off service. Use Turn Dashboard On service and you'll find that dashboard is back as usual and the widgets you had open on the dashboard are exactly as they were before.
Mac OS X 10.6 Intel
Mac OS X 10.5 Intel
Mac OS X 10.6
||This app requires Mac OS X 10.6, and does not run on Mac OS X 10.5. Please ignore the "Operating System Requirements" field for this listing.