Back in the old days (the early 2000s), you may recall the popular sitemap link located in the footer of your favorite websites. In most cases, it opened an HTML page that listed all the pages of the website. The idea was that a user could visit the page and navigate the site and get a better understanding of the website’s content. But thanks to advancements in web design, you will seldom see a modern website that includes an old-fashioned sitemap. However, most serious WordPress installations have a “hidden” sitemap known as an XML sitemap!