On the page: https://www.mongodb.com/docs/atlas/billing/subscriptions/#std-label-activate-subscription

 
Navigation design best practice: users expect to find the exact title in the navigation. So in this case, customers will look for a page called "Billing Overview" in the navigation, which doesn't exist. So instead, simply saying "Billing" will allow them to avoid guessing whether or not that is the page you are referring to.