Product Vision
How a defined customer will benefit from your product when it is fully realised. This should relate to a company's mission, vision and values. This answers WHY you are investing in a product. This is the North Star of your product.
Themes
What are the problems we are solving for the customer? What does the customer need or want. This should not be feature-driven.
Objectives
How do we support the business’s strategy? How will the business benefit from the success of the product and how will measure progress and success?
Prioritisation
What should we do? When should we do this: Now, Next, Later.