Tactical work for a product manager focuses on the shorter-term actions of building features and getting them out the door. It includes the daily activities of breaking down and scoping out work with the developers and designers, in addition to crunching the data to determine what to do next.
Strategic work is about positioning the product and the company to win in the market and achieve goals. It looks at the future state of the product and the company and what it will take to get there.
Operational work is about tying the strategy back to the tactical work. Here is where product managers create a roadmap that connects the current state of the product to the future state and that aligns the teams around the work.