Taxonomies are Hugo’s system for classifying and grouping content. Used well, they provide the structural backbone of a publishing site — the navigation paths, archive pages, and content relationships that let readers move through a site meaningfully. Hugo’s taxonomy system is flexible and powerful, but it requires deliberate configuration to use effectively. What Hugo’s Taxonomy System Does A taxonomy is a classification dimension. Tags and categories are the two built into Hugo by default, but you can define any number of custom taxonomies — series, authors, topics, formats, locations — and Hugo will generate archive pages and RSS feeds for each.