Firebase Dynamic Links are links that work the way you want on multiple platforms. With Dynamic Links, your users get the best available experience for the platform they open your link on. If a user opens a Dynamic Link on iOS or Android, they can be taken directly to the linked content in your native app. If a user opens the same Dynamic Link in a desktop browser, they can be taken to the equivalent content on your website.
Push notifications allows your application to notify user with new messages/events even when the user is not actively using your application/website. It provides a simple and effective way to re-engage with your users. Push notification for web applications is a customized message or alert delivered by a centralized server. It allow your users to opt-in to timely updates from sites they love and allow you to effectively re-engage them with customized, engaging content.