Links on the page may no longer be valid, or the information itself may become out of date. Web sites tend to grow over time as pages are added to cover new subjects or activities. If you're not careful, the whole structure can become unwieldy. Good site planning and design allows you to forestall this, so be sure to put the time in early on to decide how the growth will be managed. Putting up Web pages is just a new form of publishing, subject to many old conventions, plus a few new wrinkles.
Good offerings have useful content, clear presentation, consistent style and browser independence.
Naturally, the Web itself contains many guides on how to create Web pages. Some will tell you the latest tricks to make your favourite browser display pages to the best effect. Remember, if you want your page to be read by others, bear in mind that they won't all be using the same browser, or even the same kind of computer. It is all too easy to make a mistake in page creation which works on your browser, but awful on others. Fortunately, both software and Web sites exist which will perform this vital validation function for you.