We built this feature for all the small business owners who have to dig through Dropbox, Google Drive, emails, or a mix of all 3 in order to find and send their brand files! So think of this as one place you can store the most important parts of your brand: logo files, color codes, fonts, brand images, and video links.
You can learn more about uploading files to your brand asset library here. And definitely dive into this before your brand guide and media kits—certain things you upload here will automatically start building those out for you!