How do common motives and goals contribute to the formation of groups?

Common motives and goals facilitate goal attainment

Common motives and goals: When people share common motives or goals, they come together and form a group that can facilitate the achievement of those objectives. For example, if you aspire to prepare children in an underprivileged area for a competitive exam who cannot attend a coaching institute for lack of resources, it would be challenging to do it alone due to your own academic/professional commitments. Therefore, you gather a group of like-minded friends and collectively start teaching these children. By forming a group, you are able to accomplish what would have been impossible individually.