Submit buttons send form data to a back-end process or application. The back-end process then verifies and precesses the data, eventually passing the information into some database application.
Notice that in the above example, we also changed what was written on our button using the value attribute. This can be changed to any value you wish.
HTML - Form Submission - Action
Submission buttons send form data to whatever action has been designated by the action attribute of the encapsulating <form> element. We learned about the action attribute in our HTML Forms lesson.
If you've been following along, we've also been using the deprecated mailto action to send form data to our default email client. This will allow us to get a sense of how form values are transferred to an action.
Fill out the above form, and as your mail program opens, you can change the email address to a personal address and then send the results using the form.