A style guide is a set of standards for the creation of content and branding for your business. The main reason for having a style guide is so that everyone in your business understands how you brand your business. At a simple level, it could be the approved logo, colors and fonts for your business. Many people in your business may create public documents. It is important that everyone knows what your logo is, for example. A style guide can be an elaborate document if you have many aspects of your branding to keep consistent. A more elaborate guide could include a mission statement, company description, biographies of leaders and other common text. The key is to make a deliberate effort to organize the standards that represent your business.