A brand style guide is a document that outlines the style elements of a brand. It helps define the visual identity of a brand and ensures a consistent look and feels across all brand touchpoints. It covers topics such as the use of colors, fonts, imagery, and logo placement. A brand style guide can also include other elements such as writing style, tone of voice, and messaging guidelines. A brand style guide is a valuable tool to help keep a brand consistent and recognizable across all channels.