Snapchat launched in 2011 with only one feature - photo sharing that disappeared. They used feedback to evolve the app over time rather than adding many features at once. When screenshots became an issue, they turned it into a playful feature. Snapchat found signatures like text formatting and dog filters that defined their brand. They also launched new features simply without explanations, relying on users to discover how they worked. This viral growth strategy allowed Snapchat to reach $10 billion in valuation within 3 years of its minimal launch.