This may seem obvious, but I'm going to say it anyway. It should be clear to everyone on your team what the goal of the team is. So my challenge question to you: Is the team goal clear to everyone on your team? Before you say, "of course," how do you know? If I came into your team and asked each member, would they all tell me the same thing?
In the spirit of practical leadership advice: today would be a good day to write down your team's goal. Verify with your team that you have it right and that it is clear. Finally, post it somewhere as a reminder. I bet you find that it's not as obvious as you think it is.