$PI Pi Sign-in allows supported third-party websites and applications to offer a Pi account as an option for sign-in or sign-up.

This feature helps provide the infrastructure that enables various applications and services to recognize, connect, and serve users, both inside and outside the ecosystem.
This means Pioneers can access supported services using their Pi account without needing to create a new account or password for each application.
Why would a third-party service or website want to integrate Pi Sign-in? Pi Sign-in creates a simpler way to connect them with Pi's large user base and brings Pi users into their own product experience.
Additionally, this feature increases Pi's presence in third-party contexts while offering a way to leverage additional benefits and resources from Pi Network, beyond just user traffic.