The Company Admin can fill in all Company details in the tool. To do so, login as a company admin and go to "My Account" > My Company.
Here you can fill in any missing information.
Additionally, if your agency has enabled Branding and page customization for your company, you will have the following branding and customizing features to set up:
As you can see, this allows you to add your own company logo, your logo URL and customizing your page name and content.