Scrum Master Service to the Product Owner

From the Scrum guide:
The Scrum Master serves the Product Owner in several ways, including:

  • Finding techniques for effective Product Backlog management;

  • Helping the Scrum Team understand the need for clear and concise Product Backlog items;

  • Understanding product planning in an empirical environment;

  • Ensuring the Product Owner knows how to arrange the Product Backlog to maximize value;

  • Understanding and practicing agility; and,

  • Facilitating Scrum events as requested or needed.

How much are you coaching the PO and the Dev Team? Are you just a secretary or a proactive SM? Are you stressing the PO to create right user stories or just accept everything he ask?