Push authentication is a more secure form of user verification that uses public-key infrastructure, making it phishing resistant. Unlike push notifications, which are not designed for time-critical circumstances, push authentication can work even when notifications are disabled or blocked. Additionally, push authentication allows for silent verification, which fetches the authentication challenge in the background without requiring notifications. This method is particularly useful for sensitive information, such as email addresses or login locations, and complies with regulations like PSD2. With Twilio Verify's SDK, developers can embed push authentication directly into their mobile applications, making it a user-friendly solution.