Google Ads launched a new feature the other day named account maps. It basically gives you a way to quickly visualize your account structure, view each account's performance and navigate to those accounts.
Rather than clicking through multiple pages and tables, the account map allows you to view your manager account and all sub-accounts in one place. You can quickly understand how your account is structured and see performance metrics for each account, such as impressions, clicks and cost., Google wrote.
Here are screen shots of it:
For more details, read this help document.
Forum discussion at Twitter.