The document outlines 5 mistakes made by EventMobi in building their company, including starting during a recession, moving offices against traffic, spreading their product too thin, scaling teams too late, and not hiring executives on time. Despite these mistakes, the company has seen 100% growth year-over-year for the past 4 years, now has 70 employees across two offices, and supports over 8,000 events in 40+ countries with millions of users.