In my company, we use PingFederate for federated connections and some ADC connections to arrange for single sign-on across our infrastructure and customers.

We use PingFederate to provide SSO (Single Sign-On) solutions to enterprise applications. We support protocols like SAML (Security Assertion Markup Language), OAuth, and OpenID Connect. For example, an organization wants to enable SSO for their applications. We use PingFederate to integrate those applications and onboard them with their IdP (Identity Provider).

We primarily use PingFederate for access management authentication. It is mainly for authenticating employees, but we sometimes use it to authenticate customer applications. 

I am a consultant and this is one of the solutions that I implement for my clients.

It is used for the federation integration of the whole organization.