To understand the value of a style guide, you should first try working without one.
You’d get the wrong blue on your logo, jarring copy, and code that can only be maintained by a lone developer.
Writers, editors, programmers, engineers, social media managers, and support agents all need an indication of how their company wants to work, so they can ensure consistency.
The number one goal of a style guide is consistency.
Inconsistency weakens your brand image, makes your company look unprofessional, and hurts conversion rate and revenue. Once you’ve settled on your brand voice and style, the style guide is the document that enforces those values.