Enter the URL of the web service or application that returns the feed and the name of the PowerPivot table that will contain ...

Enter the URL of the web service or application that returns the feed and the name of the PowerPivot table that will contain this data after it is imported. Tables that do not exist in the target document will be created when the feed is imported. Valid URLs must begin with 'http://' or 'https://' if Base Url is empty.