During sprint planning, your team is having difficulty estimating the complexity of a user story. Which Agile estimation technique might be helpful in this situation?

Planning Poker is a consensus-based Agile estimation technique where team members use playing cards to estimate the complexity of user stories. It encourages active participation from all team members, promotes discussion, and leverages collective intelligence to arrive at more accurate estimates. This technique can be particularly helpful when dealing with complex user stories where individual perspectives vary.