Yep, you can monetize your 404 pages (that's a blog post from me)... Well, basically all you have to do is customize your 404 pages. If you're using WordPress, just edit your theme's 404.php file. If not, just put this line on your .htaccess file: ErrorDocument 404 /folder/404page.html Code (markup): Be sure to replace /folder/404page.html! Any ideas on what to put in your 404 pages? Like affiliate links, AdSense codes... Some questions for you: Do you have a custom 404 page? What % of your visitors find themselves on your 404 page?
I think Adsense TOS do not allow putting it on 404 pages, ad many affiliate programs have the same terms
Okay so I guess we can scratch AdSense off the list. edit: I think we can put AdSense codes on 404 pages as long as the pages have enough content... look here: http://www.seroundtable.com/archives/012689.html