Author: KAYA YURIEFF, CNN BUSINESS

From Instagram to TikTok: How social media evolved this decade

Shortly after midnight Pacific time on October 6, 2010, a new app built by a small team went live on Apple's App Store. Right away, they noticed people abroad signing up for the app, called Instagram; by 6 a.m. the startup was so overwhelmed with traffic that its servers reportedly melted down.

YouTube burnout is real; creators are struggling to cope

For eight years, Kati Morton, a mental health expert, has used YouTube to discuss sensitive issues ranging from eating disorders to anxiety. But Morton's own well-being took a hit from the demands of her work on the platform.