Anything stopping a piece of work from moving forward that the person can't resolve alone.
Example: 'I'm blocked, waiting on the API team to deploy their staging fix.'
In practice: The whole point of standup is surfacing these fast. A standup with no blockers reported for weeks usually means people aren't saying them out loud, not that nothing's wrong.
same thing as ImpedimentImpediment is Scrum's term for what most teams just call a blocker.
often caused by Zombie TicketTickets stall into zombie status most often because of an unresolved, unreported blocker.
opposite of Status UpdateA good standup surfaces blockers; a bad one devolves into status updates. They represent the two ends of what standup can become.