The segmentation and targeting of your users is essential for the relevance and personalization of your push notifications. You need to understand your users' characteristics, needs, preferences, behaviors, and feedback, and use them to create different user segments. You can use various criteria, such as demographics, location, device, activity, interests, purchase history, loyalty, or feedback, to segment your users. You can also use dynamic segmentation, to update your segments based on real-time data and events.
Once you have your segments, you need to tailor your push notifications to each segment, based on their goals, pain points, motivations, and expectations. You can use personalization techniques, such as using your users' names, preferences, or history, to make your messages more relevant and engaging. You can also use A/B testing, to compare different versions of your messages, and see which ones perform better for each segment.