A hyperlink is the exact same thing as a link. It’s just a fancy word for link. I guess you could say hyperlink is the proper name for links. But people shortened hyperlink to just link and so if you hear the word hyperlink, just know that it’s more jargon for the word link. Nothing more complicated than that.
The World Wide Web (hence the ‘www.’ that begins a web address) is made up of hyper-linked documents, content, and media and it resides on the Internet. Web browsers, the programs that we use to search the Internet, were designed to take advantage of hyperlinks and to facilitate their use. Web pages themselves are written using the hypertext markup language known as HTML. The Internet provides the underlying structure (think network) for all of this to function.