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Custom 404 Error Pageiwebchk
If a website user enters page url that does not exists on the website, web server returns 404 Not Found error. To improve user experience it customary to implement custom 404 page with link back to the working page for example homepage. We also check for soft 404 errors which are redirects from pages that do not exists to with response "200 OK" . Soft 404 errors are problematic for search engines and should be avoided.