A skip link is a local link that allows users to skip past large link collections (like navigation menus) right to a content area. They're usually only visible when focused, which is why you're not seeing a demo here until you tab to the link below.
You need to import the CSS file and assign the data attribute to use it.
@import "ssstyles/css/skiplink.css" layer(components);<a data-skiplink href="#main">Skip to content</a>