This article discusses how to use Hasura Remote Joins to join data from your Postgres database with user data in Okta. It explains that Data Federation using Hasura Remote Joins is now available in v1.3.0 stable release and can be tried out on Hasura Cloud. The author provides an example of joining Okta's API with a Postgres table called "users" to fetch user information. They also mention other posts in the Remote Joins series that explore more use-cases and possibilities for application development.