Letspush Web Push Notifications Plugin GPL Overview:
Web Push Notifications also called Browser Push Notifications are clickable messages that can be sent from a website to its user even without knowing their email or any other contact information. These notifications are delivered in real-time, even when the user is not browsing your website.
Letspush Web Push Notification Plugin allows the admin to send push notification messages to its subscribed users. You can send a custom messages, market your product or send any updates about your website to your visitors