TL;DR The <base> tag specifies the base URL for all relative URLs on a webpage, providing a default prefix for links, images, scripts, and stylesheets. It simplifies relative URLs, facilitates SEO-friendly URLs, and streamlines development by keeping URLs organized and reducing broken link risks. The <base> Tag: A Niche but Powerful HTML Element As a full-stack developer, you're likely familiar with the basics of HTML, CSS, and JavaScript. However, even among seasoned developers, there are often overlooked or underappreciated elements that can greatly impact the functionality and usability of a website. One such element is the humble <base> tag.