Hooks launched in beta on February 17th, 2017 with the aim of delivering a more customizable endpoint experience and providing more exhaustive workflows for users.
With Hooks going live on May 26th they will bring improved error handling. This includes a more detailed description of errors surfaced during the flow and custom errors based on the return message. Under beta, error messages were limited to a generic server-side extensibility error. Additionally, Hooks now supports localization of client-facing errors returned to universal login. Localizing error messages to match the general UI will greatly improve the app user experience.
Check out the Auth0 Hooks documentation or head over directly to Auth0 Hooks in the management dashboard to create your first hook.
Please be sure to let us know if you have any questions!