The fellow who created the Webform module, Jacob Rockowitz, posted an hour-long introduction and tutorial in Feb 2017 providing an overview of what Webform is, what it contains, and how you can use it in your site. We start you off at about 20 minutes in to place at the start of the practical overview, but watch it from the beginning if you would like to learn more about the history behind the Webform module project.

Additional tutorial videos are available on the Webforms module page:

Welcome to Webforms