Dreamweaver is a program used to build websites. HTML uses tags like <html> to structure web pages, and WYSIWYG editors allow content to appear similar to the final product. URLs like www.google.com locate websites, search engines retrieve data from databases or networks, and browsers like software present information from the World Wide Web. Websites are hosted using web hosting services and accessed through web servers, while cookies save information on computers and IP addresses identify devices on a network.