This is The Poynter Report, your daily guide to the news about news. Subscribe to get it in your inbox every weekday. In a landmark decision that could have significant ripple effects, a jury found Wednesday that social media giants Meta and YouTube caused damage to a 20-year-old woman, who claimed the platforms were designed to become addictive and harmful to adolescents. The trial lasted more than a month and even featured testimony from Facebook founder and Meta CEO Mark Zuckerberg. Deliberations lasted some 40 hours over seven days. The verdict is a significant blow to tech companies. The jury awarded the plaintiff — who is being called Kaley G.M., a 20-year-old from Chico, California — $3 million in compensatory damages for pain and suffering and other financial hardships. Meta is responsible for 70% of that, while YouTube is responsible for the other 30%. In addition, the jury will deliberate further to decide whether punitive damages should be awarded and for how much.…