The document discusses how Great Place to Work determines certification and rankings for best workplaces. It describes the methodology, which involves a large global study that surveys over 11.5 million employees across 10,000 companies in 90 countries. Companies are evaluated on 5 dimensions: trust, innovation, values, leadership effectiveness, and human potential. To be certified or make the best workplace lists, companies must meet survey distribution requirements, provide a culture brief, and may undergo an in-depth culture audit that examines distinguishing practices. The goal is to understand what drives companies' results and share best practices that benefit all employees.