Web browsers are used to view Web pages. Web pages can contain text, graphics, audio, video and animation, as well as interactive features such as forms and games. You're looking at a web page right now!
Each page has a unique address known as a URL (Uniform Resource Locator) which identifies its location on the server.
Web pages usually contain hyperlinks or links to other web pages, such as the button at the bottom of this page. Many linked web pages created by the same author or located at the same URL are called a web site.