Technical writing may appear on the Web as part of an electronic training manual or as online instructions. News articles, press releases and other articles are reproduced online as a matter of course today. Grant proposals might be made public as part of the selection process. In other words, if you are a writer today, you have to consider the Web. If you are writing strictly for the Web, you'll want to consider the unique requirement of writing for online readership and how you should change your writing to fit those needs.
People scan Web pages as opposed to actually reading every word.
So concise writing, lists, highlighting important words or phrases, and low word count are just some of the ways to make your online content more exciting.