You may be already know that a lot of website use customize 404 error (page not found) page. Some of these websites use landing page base 404 error page, some of them use very funny 404 error page and other 404 pages are use creative interface.
As you know that Blogger has default option for 404 error pages and this page is customizable to. Blogger's 404 page allows HTML, So you can easily add some codes in default 404 error page box.
Here two different style funny but useful 404 pages HTML code given below. These pages developed by me, what offer's a cute ghost!, go back option, contact page link and your site's social media profile option (Facebook, Twitter and feed). Choose any style and copy codes and paste them into your Blogger, than see a cool Error page in live action. Let's how these look like, how to configure, and set up into Blogger
Go to 'Settings' tab, then select 'search preferences',
Then select 'Error and redirection', 'Custom page not found'
Select 'edit' and paste following code in box
How to configure Error page's options
To configure 'by Clicking here', collect your Blog's contact page link and paste link in 'http://your site.com/contact' (it orange colored)
To configure 'Homepage', In 'http://your site.com' link replace with your website's link (it pink colored)
To configure Social media profiles, First collect your following social profile links and replace with default links, example 'https://www.facebook.com/you' replace with your Facebook profile/page link, Twitter and Feed-burner link is same (All changeable links are red colored)
Test
After set up is completed now time to check is it working or not. In address bar type your site address with wrong keyword (like- yoursite.blogspot.com/somethingnotexist ) and see your 404 page in action.
Template Compatibility
This 404 Error page is compatible with almost all stranded templates but unique designed templates, highly coded templates, Dynamic view templates will not compatible.
So what is your feeling about these 404 error page and how it looking on your Blogger blog don't forget to mention.