German discount supermarket chain Aldi triumphed for the second year running in a global survey measuring brand simplicity, which could help determine companies' popularity with customers and employees.

The survey, published on Wednesday by strategic branding firm Siegel+Gale, ranks companies by the simplicity of their communication and customer service. It argues that a "simple" brand is vital, because it creates a higher level of loyalty and pay elasticity from consumers, and increased innovation by employees.