The daily stand up is a 15 minute meeting or call, attended by everyone involved in the project.
Usually, the Scrum Master leads the call and will ask each attendee 3 questions:
- What did you do yesterday?
- What are you doing tomorrow?
- Do you have any blockers? (Anything stopping you from completing the work you’re doing?)
If there are blockers it is the Scrum Master’s job to resolve them.
The Product Owner is needed to provide greater clarity and make decisions on behalf of the service.