One of the things that is often overlooked in search engine optimization but can be of huge value is creation of a custom 404 page. To most web visitors, hitting a 404 page is a source of irritation and frustration – it’s a dead-end that says, “You’re stuck – and this website is at least a little bit broken!”
But clever SEO practitioners know that a well-constructed custom 404 page not only covers a multitude of sins in terms of broken links – it also can enhance SEO strategy and even increase revenue on ecommerce sites. Most custom 404 pages are workmanlike affairs populated by explanatory language and helpful links to take a visitor where they intended to go. But, in the hands of great designers, 404 pages not can only achieve tactical search and revenue goals, they can enhance brand and create delightful user experiences.
Take look at this article in Smashing Magazine that presents 50 of the best custom 404 pages I’ve seen. While you do that, I’ll be over here updating 404s for our SEO clients!

