With the software that is available now, you can design your Web page and have it up and viewable in half an hour. And with these tools, why would you need to run an HTML validator on your HTML to find errors?

Well, you don't have to, but if you want your pages to stay viewable through future versions of HTML, or you want newer browsers to be able to display it correctly, then writing valid HTML is the place to start. As browsers evolve, they come closer and closer to supporting the standard HTML as written by the W3C. Even if they don't fully support the most recent version of HTML, the browser builders go in and make sure that they are compliant with older versions of the standard.

If you are writing non-standard HTML, there is a chance that as browsers evolve, they will no longer support your Web pages. A good example of this is a trick that some Web developers used with an older version of Netscape. If you included multiple body tags with different colors, Netscape would load them all in in succession creating a fade-in or flicker effect as the page loaded. This trick no longer works, as it relied on an incompatibility of the browser. Table that is strung out in a long line is much lighter than one formatted with a new line every tr and td.

Many authoring tools limit line length to 60 characters or so by default, a browser will accept 255 character lines (in fact they like long lines), some email programs stop at 200. I try and keep it readable in a large monitor, and return important items. Even going from 60 characters to 120 per line can save several k on a page, it’s always good for seo engine optimization.

There are also automated software which provide seo service that some web marketers use to try and generate links for their sites. Most work the same way. You do a search at a search engine for a certain term, and the software program will visit each site in the search results, combing the HTML looking for email addresses. Once found, these programs then send an email of your creation to every site it has found an address for and asks for a link.