When you create or update your website you need to keep it healthy. This means you need to search for broken links. You want to have a website that converts more leads instead of irritating them with error pages. This health inspection is necessary as any link that is an external link or internal links must have a valid target page. So, if you have a page on your site with a link pointing at a website that no longer exists or a page on that site that has been deleted or renamed then you urgently need to remove the link or repair the link. Search engines to not like dead links on a website. It sends the crawler bots into error pages.