Widgets are small pieces of functionality such as showing the latest comments or Flickr photos. They normally display on the sidebar of your website. To check out a what a Widget can do watch the Widget video and try out the demo site
The generated share links have a public key and hash. There can be any number of share links per-page, but all share links are unique, and cannot be used to gain access to pages other than the one each link was created for.
This module was created by SilverStripe. You can ask questions on Twitter.
You can report bugs or request features on GitHub.