What are the potential pitfalls of a site that doesn't validate?

There are many pitfalls to a web site or page that doesn't validate:

• Your site may not display in all browsers:
  • Display is not as you expected.
  • There is no browsers displayed at all!
• your site may not be indexable by search engine robots and spiders
• you may have to pay extra later down the road to fix problems that should never have left the design phase

If you want to check your site, or those of a potential web designer, use this FREE validation web site produced by W3.org

Related Topics:
What is involved in marketing a site?
Does validated HTML code guarantee that a page will display correctly?
Is W3 Validation essential for a page to display properly?