Team goals

Goals and objectives are important. For me, anyway. When making up a product backlog, I find it important to have a product vision or product statement: how can you otherwise specify business value.

Having read about team goals, I've come to think the same about teams and impediments. If you hold a retrospective and for example use Prioritize with dots to decide which impediments the team should work on, how can you do this effectively if you lack a team objective?