Barron has published numerous books, essays, and articles on theology and spirituality. He is a religion correspondent for NBC and has also appeared on Fox News, CNN, and EWTN. Barron's website, WordOnFire.org, is viewed by millions of people each year. As one of the world's most followed Catholics on social media, he has been informally called the "bishop of social media" and the "bishop of the Internet". , his regular YouTube videos have been viewed over 50 million times; he has over 3 million followers on Facebook, 260,000 on Instagram, and 166,000 on Twitter. In addition, has been invited to speak about religion at the headquarters of Amazon, Facebook, and Google. He has keynoted several conferences and events over the world, including the 2016 World Youth Day in Kraków, Poland, and the 2015 World Meeting of Families in Philadelphia, which marked Pope Francis's visit to the United States.