A broken is a hyperlink on a web page that no longer works because it's encountering one or more of the issues. It is also known as "dead link".
Broken links can be problematic for;
Search rankings because they affect user experience very badly: making users unable to access the desired resource or information.
Customer experience so the website's organic traffic may reduce. Also, your overall bounce rate decreases without no reason.
Reputation because the website is perceived as not making any updates and including lots of broken links.
Wondering how to resolve your broken link problem? Here are some tips;
Regularly use Ahrefs to determine your outgoing backlinks and where they are located within your website. You can also run a Site Audit and see broken links with your domain name.
Redirect your broken webpage to a new location of it to prevent broken links.
Avoid using deep links unless you have to.