A content style guide is a documented set of guidelines and rules that break down your brand personality, and how it is (and isn’t) expressed through your content.

That sounds straightforward enough, right? But while content style guides don't seem particularly sexy or complex, it will be one of the most important documents you’ll ever create for your business.

To understand why, however, you need to learn the true purpose of a content style guide, beyond its surface-level definition.