The document discusses Lean Startup, a method for developing businesses and products proposed by Eric Ries that advocates for iterative product releases and validated learning through business hypothesis-driven experimentation. It defines Lean Startup as a process for validating assumptions as quickly as possible to discover what customers want while reducing waste. The document outlines the Lean Startup process, which involves defining customer and problem hypotheses, planning minimum viable product experiments to test assumptions, analyzing experiment results, and deciding whether to persevere or pivot the hypothesis based on the findings.