Asset Bank allows you to add custom content pages which you can use to display informational content, provide links, or even to display content hosted outside your Asset Bank. To add a custom content page:
Log in as an admin user, and navigate to Admin > Content > Menu Items and click the "Add a new custom content page" link below the existing menu items.
The Santitize HTML button will be ticked by default. Usually Asset Bank sanitizes HTML to remove scripts and dangerous markup, if you need to include embed code or scripts and you trust the users who can edit content you can turn this off.
Once Save is clicked, the new link should immediately be visible.