Web push notifications are real-time messages sent by websites to users’ devices via their browsers, even when the site isn’t open. They rely on browser technologies like the Push API and Service Workers to deliver updates, alerts, or offers directly to the user, making them highly effective for engagement and retention. These notifications are consent-based, requiring users to opt in before receiving messages, ensuring relevance and user trust. Web push is supported by most modern browsers and works seamlessly across desktop and mobile platforms without needing a dedicated app. They are widely used for purposes like promoting sales, delivering news updates, and sending reminders, offering businesses a powerful tool to stay connected with their audience.