A 404 error in Google Search Console means a page is missing or was deleted, leading to a “Page Not Found” response. These errors impact SEO as they affect user experience and may reduce your site’s authority. To fix, identify the 404 URLs in Search Console, then either set up redirects to relevant pages, restore deleted pages, or update internal links.
For more guidance, read a blog at : https://www.algosaga.com/blog/google-search-console-404-error/