1) The document discusses REST API design principles, including using nouns to represent resources, HTTP operations for CRUD, query parameters for additional conditions, HTTP status codes and custom error codes, and API versioning.
2) It provides examples from Facebook, Twitter, LinkedIn, Oracle PaaS, and Oracle Cloud Infrastructure APIs to illustrate pagination, fields selection, HATEOAS, and more.
3) The presentation covers additional best practices like returning partial responses, verbs for non-resources, and association resources.