Forms are a means of collecting information, designed to obtain user inputs or dynamically show data to site visitors. Users fill in a form and/or select something, and then they click a button.
For something to be done with the information, it must be sent somewhere. User inputs taken from a form are sent to web server and processed by a Common Gateway Interface (CGI).
What actually processes the data is a server-side program, usually CGI, not the form itself. Forms only obtain or show data. However, form has one required attribute, ACTION, specifying the URL of a CGI script which processes the form and sends back feedback.
