How Web Push Notifications Work
Web push notifications use the W3C Push API, a standard built into modern browsers. When a visitor opts in on your website, the browser registers a unique subscription endpoint with the push service (FCM for Chrome, Mozilla Push for Firefox, etc.). Pushnexom stores this subscription and uses it to send messages through the browser's push channel.
Notifications are delivered by the browser's native notification system — they appear on the user's desktop or mobile lock screen even when your site isn't open. Each notification can include a title, body text, icon, image, action buttons, and a click-through URL.
Notification Anatomy
Every Pushnexom notification supports the following elements:
- Title — Bold headline (required, max ~65 characters)
- Body — Supporting text (required, max ~120 characters)
- Icon — Small square image, typically your logo (recommended 192×192 px)
- Large image — Banner image displayed below the text (recommended 720×480 px)
- Click URL — Where the subscriber lands when they click
- Action buttons — Up to two additional buttons with custom labels and URLs