Push notifications are brief messages sent to users' devices, typically smartphones or tablets, to alert them about important updates, events, or offers from an app or website. These notifications appear directly on the user's screen, even when the app or website is not in use, making them an effective way to capture attention and drive engagement. Push notifications can be personalized and targeted based on user preferences, behaviors, or location, enhancing their relevance and effectiveness. Whether it's a reminder about an upcoming event, a special promotion, or breaking news, push notifications provide a direct and immediate communication channel between businesses and their audience, fostering engagement and driving actions such as app usage, website visits, or purchases.