The iFrame widget is a flexible widget which can embed any type of content, SharePoint or from an outside source

• The iFrame widget allows an iframe to be embedded on the page as content
• The column data returned for that item can be specified on an instance basis
• The iFrame widget can work with any list and is not dependent on a specific content type
• As a flexible content data retrieval widget, many views can be associated with the widget to provide flexible rendering of the data elements on the site.

• Widget Name:  iFrameWidget 
• Available With:  Release 4.1 and Above
• Content App Type:  N/A 
• Content Type:  N/A 
• Content App Name:  N/A 
• List Name:  N/A 
• Recommended Images Sizes:  N/A 
• Dependencies:  Embed any type of content, SharePoint or from an outside source

N/A, Content is based on the URL you put in the properties

Views depend on what content you choose to embed in the widget.