音樂串流網站 TuneStreamer.com 的訂閱訂單數量目前正逐漸減少。身為網站的行銷主管，你有責任找出原因並解決問題。Google Analytics (分析) 報表似乎指出結帳頁面很不容易操作，顯然結帳體驗有某種問題會降低客戶的消費意願。 哪一項 Google 功能可透過使用者 Google 帳戶中儲存的資訊簡化結帳流程？

One Tap Sign-in simplifies the checkout process by allowing users to sign in or sign up with their Google Account in a single tap, leveraging information already stored in their Google profile. This reduces friction and potential abandonment during checkout. Multi-factor authentication is a security measure, not a checkout simplification tool. Google Analytics is for data analysis, not direct checkout facilitation. "Google Shopping Cart" is not a specific Google feature that simplifies checkout in this manner; Google Pay is a payment method, but One Tap Sign-in specifically addresses the login/signup aspect of checkout.