The document outlines the key conventions of a fact-based NHS website. It includes navigational elements like tabs and drop-down menus to help users navigate between sections and topics. It also features things like embedded videos, a search box, logo, and sharing/printing icons to provide additional information and ways for users to engage with the content. The website structure involves written articles organized with subheadings, bullet points, and hyperlinks to present factual information on various health topics.