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Like we all know "404 Not Found" pops up in our web browsers now and then. This 404 error message means that we communicated with the given server but the server could not find what was requested.
Most of the websites don't prepare a page for this error whereas this particular page can make an impact on visitors. If visitors couldn't find a CTA (Call to Action) it can cause a crisis. On the other hand, there are some websites that turn this crisis into an opportunity.
These are the websites that have a creative "404 Not Found" page: