Web Push Notifications
As opposed to emails, push notifications require an opt-in from customers and are proven to deliver better CTRs (Click Through Rates). Therefore, engaging customers through this highly-effective, rapidly growing channel could be challenging, but equally fruitful.
To rest assured that your customers are, in fact, engaging well with your web push notifications and performing the desired actions, you need to first optimize your opt-in for maximum conversions. Make sure your opt-in copy is personalized and compelling and highlights your value proposition to make customers want to stay updated with your offerings.
Next, instead of restricting their usage to promotional messages, use push notifications as a medium to regularly push updates, trends, new content, and other useful resources. Here's an example of the same:
Also, segment your lists to send out targeted notifications to your customers so they are in line with their interests and needs. Personalize them basis your customers' geographic, demographic, and other relevant attributes to improve chances of engagement.
Most importantly, avoid spamming your customers or sending redundant messages if you are using more than one channel for the same campaign. It will only annoy customers, harm your engagement metrics, and might even increase your unsubscription rate.