Nearly all SiteBuilder templates come with navigation links between website pages either in the header or footer. Using a navigation bar is the best, and easiest, way to manage links between pages.
Automatically the navigation links will update to include any pages you add to your website. Alternatively though, any element of piece of text can be turned into a link to another page of your website, simply click the element or highlight text and click the link icon. In the lightbox that appears click the radio button; Website Page. Then from the drop down menu, select the page you want the link to go to.