hugo/docs/content/en/hugo-modules/introduction.md

title, description, categories, keywords, weight

title	description	categories	keywords	weight
Introduction	A brief introduction to Hugo Modules.			10

Hugo uses modules as its fundamental organizational units. A module can be a full Hugo project or a smaller, reusable piece providing one or more of Hugo's seven component types: static files, content, layouts, data, assets, internationalization (i18n) resources, and archetypes.

Modules are combinable in any arrangement, and external directories (including those from non-Hugo projects) can be mounted, effectively creating a single, unified file system.

Some example projects:

https://github.com/bep/docuapi

A theme that has been ported to Hugo Modules while testing this feature. It is a good example of a non-Hugo-project mounted into Hugo's directory structure.

https://github.com/bep/my-modular-site

A simple site used for testing.