Some say brand board, style guide, inspirational board, or brand guide. I like to call it brand board.
So what is a “brand board?” It is a graphic/file that contains your primary logo, secondary logo (if you have one), color palette (scheme), fonts, design elements, and visual elements needed to keep your brand consistent. It is ideal to have when communicating with your graphic designer and others that will work on your brand. I like to say it is the foundation to your brand. It's your brand structure.
Below you will see two brands that Studio By KAD has been working with. On the brand board you will see the logo elements and actual elements that consist the brand.