Web design is the planning and creation of websites. This includes the information architecture, user interface, site structure, navigation, layout, color's, fonts, and imagery. All of these are combined with the principles of design to create a website .
The basic principles of design are true for Web design as well as other design. They show you how to put together design elements in an effective manner. Design is more than just slapping HTML tags up onto a page, and with the help of these principle we are create effective website.
When you design a user interface you are creating a structure for how the website will be perceived intellectually. It includes things like the theme or metaphor of the site - how readers will know what to click and what path to take through the site. It also includes information architecture to classify and structure the site.