You can track all the Google Analytics metrics available from GA4 API, including:
1. Users: Active Users, New Users, and Returning Users
2. Traffic Acquisition: Source/Medium, Channels, and Campaigns
3. User Behavior: Pageviews, Average Time on Page, Engagement Rate (including Bounce Rate in Universal Analytics), and Events (specific to client goals)
4. Conversions: Goal Completions, E-commerce Purchases, Conversion Rate (First Time and Total), Total Revenue
5. User Engagement: Engaged Sessions, Session Duration, Interactions per Session, Retention
6. Audience: Demographics, Interests, Device Category
7. Events: Specific events related to key actions, Event Count
8. Custom Metrics: Any custom metrics that are specifically relevant to the client's objectives
































