A project manager, product manager, and product owner all have important roles in the development and success of a product. However, there are significant differences between these roles that need to be understood to effectively manage and lead a team.

A project manager is responsible for the overall planning, execution, and delivery of a project within a specific timeline and budget. This includes coordinating the work of team members, managing resources, and ensuring that the project stays on track and meets its goals. The project manager's focus is on completing the project within the specified timeframe.

On the other hand, a product manager is responsible for the overall strategy and direction of a product. They work with the product team to define the product roadmap and ensure that it aligns with the company’s overall vision and goals. Product managers are also responsible for understanding the needs and want of the target market and using that information to guide product development. Unlike project managers, product managers focus on maximizing the value of the product over its lifespan.

Finally, a product owner is a member of the product team who is responsible for representing the interests of the end-users and stakeholders. They work closely with the product manager to prioritize features and functionality for the product and ensure that the development team is building the right things in the right order. Product owners often have a strong understanding of the target market and can provide valuable insights and guidance to the development team.

In short, project managers focus on the delivery of the product, product managers focus on the overall strategy and direction of the product, and product owners represent the interests of the end users and stakeholders. All three roles play important roles in the development and success of a product, and teams need to have clear communication and understanding of these roles to work effectively.