貴商家有網站和應用程式，你想要分析這兩種平台的使用者歷程，並瞭解新使用者如何進入網站和應用程式。該使用以下何者來獲得這類洞察資料？

Google Analytics 4 (GA4) properties are designed for cross-platform tracking, allowing you to analyze user journeys across both websites and apps within a single property. This unified view is crucial for understanding how new users engage with your brand across different platforms. Google Marketing Platform is a broader suite of tools, not a specific analytics property for this purpose. The Google Analytics Admin API is for programmatic access and management of GA properties, not for direct data analysis. Firebase is Google's development platform for mobile and web applications, which integrates with GA4 for app analytics, but GA4 itself is the tool for gaining the desired insights across both platforms.