From Intelligent Editing: In publishing and media companies, use of a style guide is the norm. However, style guides can also be useful for any organization that prepares documents for clients and the public. This article is for organizations outside of the publishing industry who can benefit from the introduction of a style guide.
A style guide is a reference point that sets standards for writing documents within your organization. The focus of the style guide is not usually a matter of ‘correct’ or ‘incorrect’ grammar or style but, rather, it provides guidance for instances when many possibilities exist.
Style guides offer you the chance to present your brand in a consistent way. They help to ensure that multiple authors use one tone. And they help save time and resources by providing an instant answer when questions arise about preferred style.