what's the difference between a product marketer and a snr product marketer - how to learn and develop strategy skills so you can set better goals and be strategic in your approach instead of just reacting to daily asks? Any book recommendations?

Generally as you become more senior in your product marketing career (or any career), your role will become more strategic and cross-functional. As you begin to show that you can not only work well in the trenches (create compelling messaging and content, etc.) but also come to the table with new ideas, take more ownership, and influence other stakeholders, you'll be seen as more valuable to the company.

Ask your manager to help you develop a plan re: what skills to develop and projects to own that will help prepare you for a Senior PMM role.

Another piece of advice that I can't give often enough: talk to everyone you can. Seek to truly understand the roles and priorities of your stakeholders in product, sales, customer success, and core marketing. As you incorporate their priorities into your planning, you'll find yourself thinking much more strategically.

And last but not least: if you feel you're qualified and ready for a promotion, make it known! Often senior leadership can get wrapped up in other initiatives and may not be tracking progress as well as they should. There's nothing wrong with making the case for your promotion directly.