Who is Keith Gill, the "Roaring Kitty" pumping up GameStop shares?

GameStop has recently reprised the stock frenzy that gripped the video game retailer in 2021, when the company's share soared as much as 2,000%. Then, as now, the man driving the original "meme stock" is Keith Gill, an amateur trader whose power to move markets stems from his popularity on social media. 

Read on to learn more about Gill.