Daniel Schreiber, a former PE teacher turned fitness entrepreneur, reveals his journey from a side hustle to a $3 million business. He discusses navigating the challenges of app development during the pandemic and pivoting to online coaching. Schreiber shares his insights on leveraging social media to build a massive following, using lead magnets to drive subscriptions, and the financial advantages of high-priced coaching. He emphasizes the importance of community engagement and effective sales funnels in reducing churn and optimizing revenue.