It’s inevitable. Despite your best efforts to prevent them, there will likely be some 404 errors showing up on your website for old pages that have been discontinued on your site. Or perhaps someone just inadvertently mistyped the URL they were linking to on your website.
Certainly, 404 errors aren’t great for search engine indexing, but they also represent potential inbound links that are now broken and lost. Or can those links be reclaimed? I have two techniques you might want to try.