How do I setup a vacation message in Gmail using a web browser?

If you'll be away from your Gmail account, like on a vacation or without access to the Internet, you can set up a vacation responder to automatically notify people that you won't be able to get back to them right away. When people send you a message, they'll receive an email response containing what you've written in your vacation auto reply. Learn how to set up an out of office or vacation reply here.