Full-stack developers are proficient in front-end and back-end development, enabling them to work on all aspects of web applications. If you’re looking for course information about becoming a full-stack developer, please refer to the email you mentioned earlier. If you’re concerned about the email not going to spam when sent in bulk, use proper formatting relevant content and avoid spammy keywords to increase the chances of it reaching recipients’ inboxes. If you have any specific questions about full-stack development or related topics, feel free to ask!