Your site needs to be clean, simple, and well-structured. People use the Net to find information. The best include informative content, simple layout, easy navigation and fast loading graphics. It allows users to search for and locate the information they desire in the quickest and most convenient manner possible. On the other hand, your Web site design is a reflection of your business, the quality of your product. Web surfers looking for some information not only want the right info, they want it from the right source. So make sure that your site doesn't look like it was designed by a novice.
One of the first things about the professional Web site design understands that your site will be viewed on a variety of computer platforms and browsers. Mostly it doesn't matter, but occasionally it does. The platform issue is much less of a concern than the browser issue. As to browsers, both the version of the software and the brand are essential. Different browsers display the same page in different ways (or sometimes don't display it at all). Older versions don't support all the new tag additions and modifications. They just ignore any tags and attributes they don't recognize. Always check your Web design on at least the latest versions of the most popular browsers Internet Explorer and Firefox. While no site looks identical on all monitors, browsers, and computers, you can design sites that look good on all, but only if you test the site on all.
One of the most significant problems that face Web designers is slow loading time, which often annoys users to the point where they give up and go to another site. So it is extremely important to design your pages to load as quickly as possible, which means keeping page sizes as low as possible.