If a visitor lands on a page that no longer exists, a 404 error page is displayed in the process. This error can have several reasons: The permalink was changed, the page no longer exists, or it was deleted.
There are several ways to fix the 404 error page problem. In a customer project, for example, we directly built in a callback function that allowed the customer to ask for a callback. This massively improved customer satisfaction even when there were errors on their own website.
On our site flinkthink.ch, we have placed a link on the 404 page that leads back to the homepage and log the 404 errors. This allows us to automatically monitor and optimize the errors on our site, or redirect the incorrect URLs accordingly.
For example, our error page looks like this:
