The story of YouTube, the global phenomenon which single-handedly upended traditional media and transformed Google into one of the world's most profitable companies.

Since 2005, YouTube has exploded, giving a platform to unique and valuable voices, but also to propaganda, misinformation and illicit videos. The algorithm which determines whether a channel lives or dies - how or when videos are seen, and how much creators earn through advertising - is notoriously secretive, remaining a mystery to consumers and broadcasters alike. At the same time, the site is massively profitable for parent company Google, helping turn it into one of the most influential powers on the planet.

In Like, Comment, Subscribe, Bloomberg tech journalist Mark Bergen delivers the definitive account on YouTube, detailing how it started, how it works and ultimately how it drives Google's success. It can be seen as the story of a technical marvel that has upended traditional media and created stars out of everyday people, or the story of the rise of a ruthless advertising conglomerate with little regard for its impact on the world beyond the bottom line - but in reality, it's the story of both.

The gripping inside story of YouTube, the company that upended media, culture, industry, and democracy-by a leading tech journalist Across the world, people watch more than a billion hours of video on YouTube every day. Every minute, more than five hundred additional hours of footage are uploaded to the site, a technical feat unmatched in the history of computing. YouTube invented the attention economy we all live in today, forever changing how people are entertained, informed, and paid online. Everyone knows YouTube. And yet virtually no one knows how it works. Like, Comment, Subscribe is the first book to reveal the riveting, behind-the-scenes account of YouTube's technology and business, detailing how it helped Google, its parent company, achieve unimaginable power, a narrative told through the people who run YouTube and the famous stars born on its stage. It's the story of a revolution in media and an industry run amok, how a devotion to a simple idea-let everyone broadcast online and make money doing so-unleashed an outrage and addiction machine that spun out of the company's control and forever changed the world. Mark Bergen, a top technology reporter at Bloomberg, might know Google better than any other reporter in Silicon Valley, having broken numerous stories about its successes and scandals. As compelling as the very platform it investigates, Like, Comment, Subscribe is a thrilling, character-driven story of technological and creative ingenuity and the hubris that undermined it.