This is a genuinely contested question with substantial evidence on multiple sides. Rather than search for a definitive "answer" (since this is fundamentally a matter of ongoing scientific debate and value judgments, not a factual query with a settled answer), let me share what the research generally shows, and you can weigh it yourself.
The Case for Harm
Mental health concerns, especially for adolescents:
•Studies have linked heavy social media use to increased rates of depression, anxiety, and loneliness in teens, particularly girls
•Social comparison, cyberbullying, and disrupted sleep are common mechanisms cited
•The U.S. Surgeon General issued advisories about risks to youth mental health
Other harms:
•Misinformation spreads rapidly and can be hard to correct
•Algorithmic design encourages compulsive use (attention economy)
•Political polarization may be amplified by echo chambers and outrage-driven content
•Privacy erosion and data exploitation
The Case for Benefit
Connection and support:
•Enables maintaining relationships across distance, especially valuable for isolated individuals (LGBTQ+ youth, people with disabilities, rural populations)
•Provides community and peer support for marginalized groups
•Useful for organizing social movements and civic engagement
Information and opportunity:
•Democratizes access to information, education, and small business/marketing opportunities
•Can raise awareness of social issues quickly
•Some studies show null or even positive effects on wellbeing for certain users/uses
Why There's No Simple Answer
Researchers increasingly emphasize that effects depend heavily on:
•How it's used (passive scrolling vs. active engagement) rather than just time spent
•Who is using it (age, existing mental health, social context)
•Which platform and its specific design features
•Individual differences make broad generalizations unreliable
Prominent researchers disagree sharply—some argue the evidence for harm is strong and causal, while others argue correlational studies are being overinterpreted and effect sizes are small.
Bottom line: It's neither purely harmful nor purely helpful—it's a tool whose effects vary by use pattern, user vulnerability, and platform design. If you want, I can search for more specific recent research on a particular angle (e.g., teen mental health data, or effects on democracy/misinformation) if that would be useful.