What is the dominant role of the antagonist of a conflict?

To bring conflict to protagonist 

Claim for social media: social media is a growing issue in our society but, is it really an issue. social media can allow children and young adults to see different aspects of culture, communicate, and share experiences with peers.counterclaim: although social media can be distracting to children and young adults, limiting usuals in social media can ensure social media is an addition and not a control factor to your day to day life.