Standard Web documents are easier for search engines to access, and easier to index more accurately. Standard Web documents are easier to convert to other formats. Make a habit of validating your pages with a validation service. Validation keeps your documents up to the standards and free of nasty errors. Accessibility Accessibility is an important part of the HTML standard.
Standards make it easier for people with disabilities to use the Web.
Blind people can use computers that read Web pages for them. People with poor sight can rearrange and magnify standard Web pages. Simple Web standards like HTML 4 and CSS, will make your Web pages much easier to understand by special devices like voice browsers, or other unusual output devices. As developers, especially when creating educational Web sites, we can help them turn this dream into reality. You can read more about W3C in the next chapter.