ANSWER:

You should let the user know whether or not their information was successfully submitted, then direct them to an appropriate page.

For example, if I have a form asking a user to write a short bio about themselves, after they submit it I should:

1. Tell them that their bio has been updated, and
2. Redirect them to a related page, such as back to their profile page.

Charles Tian from http://stackoverflow.com/questions/14433974