Here are some commonly asked questions about this topic.
Can the scrum master also be the product owner?
The two roles balance each other, thus placing you in tension with yourself. You you hold both roles, you must be mindful of how you communicate with the development team. Holding both positions can also impact how much agency the dev team feels they have.
The product owner works with the scrum master to look ahead to future sprints, evaluating significant milestones to ensure they deliver critical features on time. They also check to see if the work needed to get there matches the capacity or velocity of the team.
How is the product owner different from the scrum master?
The product owner products the product vision by balancing the needs of both the business and the customer. The scrum master protects the team’s health by balancing the product owner’s drive to complete the product with the team's long-term effectiveness.