You can add OEM logo into this folder to enable OEM branding on Developer Hub 
To do this you need to create an image that complies with the following:

Image name: oem-branding.png
Image type: PNG (high resolution)
Image background: Transparent
Image width: Up to 430px
Image height: 100px
Image location: /var/www/www-repo-gui/branding

Copy the file to that folder and it will be part of the customized OS image when the image is rebuilt in the next step.

