The document discusses search engine optimization (SEO) techniques for websites built with Joomla. It provides guidelines from Google on how to structure websites for search engines, including using clear hierarchies, descriptive text links, and site maps. It also discusses best practices for SEO, such as using relevant keywords in titles, meta descriptions, and content; organizing content well; and validating websites using tools from Google and W3.org. Red flags for SEO that could harm rankings are also highlighted, such as hidden text or duplicate content.