Perform a web search and find a source that discusses the negative effects of social media.
This article from the Daily Mail on the effects of social media on young people's mental health provides a good overview of the negative effects of social media: https://www.dailymail.co.uk/health/article-2834094/Why-does-social-media-devastating-levels-mental-health-Young-people.html
The article “The Negative Effects of Social Media” provides an overview of the effects of social media on mental health and wellbeing.