Push Notifications Overview Web push notifications deliver timely messages to subscribers even when they are not on your site — for back-in-stock alerts, price drops, and cart reminders. Push requires explicit browser permission, making the opt-in prompt timing critical. For Shopify, WooCommerce, and BigCommerce, dedicated push notification apps (PushOwl, OneSignal) handle all the subscriber management, triggering logic, and delivery without custom service worker code. When to Use This Skill - When adding back-in-stock notifications to replace static "notify me" email forms - When recovering…