# FAQs

- [How to subscribe to push notifications on browser?](/help-and-referrence/faqs/how-to-subscribe-to-push-notifications-on-browser.md)
- [How to subscribe to push notifications on mobile?](/help-and-referrence/faqs/how-to-subscribe-to-push-notifications-on-mobile.md)
- [How to unblock notification permission?](/help-and-referrence/faqs/how-to-unblock-notification-permission.md)
- [How to install QuickReply on mobile?](/help-and-referrence/faqs/how-to-install-quickreply-on-mobile.md)
- [How to collect WhatsApp Business opt-ins for your Shopify store?](/help-and-referrence/faqs/how-to-collect-whatsapp-business-opt-ins-for-your-shopify-store.md)
- [How to send WhatsApp message using REST API?](/help-and-referrence/faqs/how-to-send-whatsapp-message-using-rest-api.md)
- [How to share Facebook Business Manager Access to QuickReply?](/help-and-referrence/faqs/how-to-share-facebook-business-manager-access-to-quickreply.md)
- [What are the media file size limits and aspect ratio in WhatsApp Business API?](/help-and-referrence/faqs/what-are-the-media-file-size-limits-and-aspect-ratio-in-whatsapp-business-api.md)