The document discusses how to build APIs using Django Rest Framework. It explains that Django Rest Framework allows Django code and data to be accessed via API endpoints. It provides a breakdown of the key components needed, including serializers to define request and response formats, viewsets to handle requests and responses, and routers to define URL patterns. Documentation and testing are also emphasized to ensure usability and prevent errors from changes. Overall the document serves as a tutorial for getting started with building APIs using Django Rest Framework.