It highlights the autonomy of individual churches to make their own decisions. Their commitment to congregationalism means they vote on their own leadership.
Pro Tip 2/3
Not Centralized
Emphasizes the absence of a higher church authority controlling local congregations. Under congregationalism, there's no bishop telling the community how to worship.
Pro Tip 3/3
Protestant Context
Mainly used within Protestant Christianity, not applicable to other religions. Congregationalism set many Protestant churches apart from Catholicism's hierarchy.