404 errors in SEO

[amar006]

A 404 error occurs when you try to visit a web page that doesn’t exist. Sometimes, the problem is on the website itself.
if you are having 404 pages on your website then redirect those url to working pages until they are fixed

[riyajindal]

When a page URL no longer exists or is renamed, any links directing to the original URL will return a 404 Not Found error.

There are common instances that may result in a significant number of 404 errors. These include:

>Website redesigns
>Product pages that have been altered, removed or discontinued a which results in changing or deleting
>Spelling errors within links a whether internal or external
>Shifting a website or page from HTTP to https (or vice-versa)

[Arpita]

A 404 page is what a user sees when they try to reach a non-existent page on your site (because they’ve clicked on a broken link, the page has been deleted or they’ve mistyped a URL).