What's the difference between Shared Worker and Worker in HTML5?

Question

After reading this blog post: http://www.sitepoint.com/javascript-shared-web-workers-html5/

I don\'t get it. What\'s the difference between a Worker and

Answer 1

A shared worker can work with multiple connections. It posts messages to ports to allow communication between various scripts.

A dedicated worker on the other hand is simply tied to its main connection and cannot post messages to other scripts (workers).