The Importance of Consensus in Groups

I'm not sure if I completely understand the claim that groups seek consensus, individuals seek truth. What do you mean with group here? Is it sort of a society or government-based group or is it any kind of group? Any group gets together based on a common set of goals and beliefs. If the group cannot agree upon their goals and how to get there, then the group separates and goes and creates another group. So a group without consensus is very short-lived.