When you create a website it usually contains a lot of your own content and internal navigation links. All of these are under your control so you are aware of any changes. You may also want to include links to external resources or websites that would be useful to your audience. These external links however are beyond your control. Over time they may lead to content that has moved or websites that have been abandoned. These broken links are a problem because they lead your visitors to pages that do not exist and present an error page instead of expected relevant content. Additionally, the number of broken links on your website may be a factor which search engines use in determining how to rate your website. It is in the best interest of all parties to fix broken links on your website.
Search Engine Optimization
SEO strategies help your website to be found by search engines and audiences.