When communication helps a group to achieve its goals, it is known as:

When communication helps a group reach its goals it is playing a promotive role.

Promotive communication moves the group forward by informing, coordinating and encouraging joint effort.

A disruptive role does the opposite, breaking down cooperation and hindering the goal.

A counteractive role works against a proposed course, checking or opposing group movement.

A devotional role concerns reverence or worship and has no bearing on task achievement in a group.

Group task roles are classed by whether they help, hinder or counter the shared objective.