On your Moodle site, you can show content from anywhere on the Web by using a link. You can also link to files that you've uploaded into your course. By default, this content appears in a frame within your course. You can also choose to display it in a new window.
When using content from outside sites, you need to consider the legality and reliability of using the link. Is it legal to display the material on your Moodle site? Will the material still be there when your course is running? In this example, I've linked to an online resource from the BBC, which is a fairly reliable source:
Remember that the bottom of the window displays