Does the form automatically updates when edited?

if I edit my jot form do I need to reshape my original link?

or

does it automatically update and the original embedded link can remain?

Updates will automatically reflect for the forms embedded using its default embed code, form URL or its direct link, iframe embed code, lightbox etc.. except when you embed the form using its full source code.

More info: http://www.jotform.com/help/67-Which-Form-Embed-Code-Should-I-Use