Each reStructuredText (rst) file, corresponding to an HTML page, that you add to the doc/ directory of a package should correspond to a topic type.
Topic types are templates and associated guidelines that describe how to structure different types of content.
By conforming to topic types, documentation contributed by a diverse group of collaborators is more structured and uniform.
Structured documentation is easier for readers to navigate and consume.
These are the available topic types for package documentation: