Many products serve more than one customer or user type. If your product is in education, you might consider the student, teacher, administrator, and parent. Furthermore, your users might be different from the actual buyer.
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If your product is like this, it’s a good idea to identify which themes or features apply to which customer types. This can be as simple as customer tags on your roadmap items. This makes it clear to your team (and your stakeholders) who you are focused on and when.
I go in depth in Chapter 6 of Product Roadmaps Relaunched. Got lots of customer or user types? Tell me a story.