The four types of brands are: - Product brands: Brands that are associated with specific products, such as Nike for athletic shoes. - Service brands: Brands that represent services rather than physical products, such as FedEx for courier services. - Personal brands: Brands that are based on individuals, such as Oprah Winfrey or Elon Musk. - Corporate brands: Brands that represent the entire company or organization, such as Apple or Coca-Cola.