The document provides an overview of tone of voice for brands and discusses how to establish a consistent tone. It defines tone of voice as the character of a brand expressed through written communication. An effective tone of voice can give a brand identity, make it familiar and unique, and build trust. The document uses Ted Baker and BrewDog as examples, with Ted Baker having a traditional tone with a twist and BrewDog using passionate, swearing language. It concludes by listing steps to establish a tone of voice, such as defining values, personality, vocabulary, and creating a style guide.