A Style Guide is used in many aspects throughout the field of graphic communications, mostly commonly used in some form of marketing and verbal communications. A Style Guide can also be used in design aspects of the field. A style guide in graphic communications serves as a comprehensive document that outlines the guidelines, standards, and specifications for maintaining visual consistency across various design materials. They help to create consistency as it ensure that all visual elements such as typography, color schemes, imagery, and layout, remain consistent across different communication channels and materials. 

This consistency helps in building brand recognition and trust among the audience. It develops brand identity which defines and reinforces the brand's identity by specifying the proper usage of logos, brand colors, fonts, and other visual elements. This consistency strengthens brand recognition and reinforces brand values. It allows for efficiency by streamlining the design process by providing designers with clear instructions and reference materials. This helps in saving time and effort by avoiding the need to recreate design elements from scratch for each project. They help to create clarity in clarifying design decisions and standards for everyone involved in the design process, including designers, marketers, and stakeholders. This ensures that everyone is on the same page regarding the visual direction of the brand. They also serve as a tool for quality control by providing a reference point for evaluating design work. Designers can compare their work against the guidelines outlined in the style guide to ensure adherence to brand standards.