Often times, external styles defined in a site’s CSS. The purpose of a stylesheet is to make sure that multiple contributors create in a uniform and cohesive way that reflects the style and ensures brand consistency. CSS can define things like font-family for H1 text or display how links should be decorated on a page. These stylesheets take precedence over styles added in Builder, so you may notice that as you try to style elements, your site’s CSS will override those changes in Builder. Feel free to reach out if you have questions!