A Web site is a collection of information about a particular topic or subject. Designing a web site is defined as the arrangement and creation of web pages that in turn make up a web site. A web page consists of information for which the web site is developed. A web site might be compared to a book, where each page of the book is a web page. There are many aspects (design concerns) in this process, and due to the rapid development of the Internet, new aspects may emerge. For non-commercial web sites, the goals may vary depending on the desired exposure and response. For typical commercial web sites, the basic aspects of design are: the substance, and information on the site should be relevant to the site and should target the area of the public that the website is concerned with. the site should be user-friendly, with the interface and navigation simple and reliable. the graphics and text should include a single style that flows throughout, to show consistency. The style should be professional, appealing and relevant. the site must also be easy to find via most, if not all, major search engines and advertisement media. A web site typically consists of text and images. The first page of a web site is known as the Home page or Index. Some web sites use what is commonly called a Splash Page. Splash pages might include a welcome message, language or region selection, or disclaimer. Each web page within a web site is an HTML file which has its own URL. After each web page is created, they are typically linked together using a navigation menu composed of hyperlinks. Faster browsing speeds have led to shorter attention spans and more demanding online visitors and this has resulted in less use of Splash Pages, particularly where commercial web sites are concerned. To be accessible, web pages and sites must conform to certain accessibility principles. These can be grouped into the following main areas: 1.use semantic markup that provides a meaningful structure to the document (i.e. web page) 2.Semantic markup also refers to semantically organizing the web page structure and publishing web services description accordingly so that they can be recognized by other web services on different web pages. Standards for semantic web are set by IEEE 3.use a valid markup language that conforms to a published DTD or Schema 4.provide text equivalents for any non-text components (e.g. images, multimedia) 5.use hyperlinks that make sense when read out of context. 6.don't use frames 7.use CSS rather than HTML Tables for layout. 8.author the page so that when the source code is read line-by-line by user agents (such as a screen readers) it remains intelligible. (Using tables for design will often result in information that is not.) However, W3C permits an exception where tables for layout either make sense when linearized or an alternate version (perhaps linearized) is made available. Before creating a website, it is important to take the time to plan exactly what is needed in the website. Thoroughly considering the audience or target market, as well as defining the purpose and deciding what content will be developed are extremely important.