If you are on the PushPro Booming plan, you will have access to user segmentation. For segmentation to work, PushPro will collect various anonymous data from your subscribers, such as their browser type, timezone and visited page URLs. If you want to use segmentation, make sure to have this setting enabled.
If you are not (yet) on the Booming plan, you can still enable this feature. This will let you already gather subscriber data, which you can use as soon as you upgrade to the Booming plan. You’ll be off to a great start with already a lot of subscriber data at your disposal!
Note that enabling subscriber tracking will update your code snippet to include a line tracking: true, so make sure to update the snippet on your website.