Pro: Social media allows people to improve their relationships and make new friends.
https://www.pewresearch.org/internet/2015/08/06/chapter-4-social-media-and-friendships/
In the pro side of the conversation, it is proven that in a large percentage of people on social media, interacting through these apps allow them to feel more comfortable communicating. Social media allows you to keep up with your friends, communicate with people all over the world, and to meet new people.
Con: Social media can lead to stress and offline relationship problems. https://www.thejakartapost.com/life/2019/01/09/why-social-media-is-boosting-your-stress.html
According to the cons side of the conversation, social media is said to be addicting, and stressful as it opens you up to bullying, sleep deprivation, lack of communication in reality and relationship issues.