Observability

Feature flags play a crucial role in the software development lifecycle, enabling safe feature rollouts, experimentation, and A/B testing. When you integrate your feature flags with the Vercel platform, you can improve your application by using Vercel's observability features.

Tracking which flags are evaluated and when gives you insights into:

• How features perform in production
• Which user segments see which features
• The correlation between flags and application metrics
• Issues related to specific flag configurations

Both observability integrations work by reporting flag values as your application evaluates them:

1. When your code evaluates a flag, call reportValue(flagKey, flagValue)
2. Vercel captures these evaluations and associates them with the request or event
3. View the data in Runtime Logs or Web Analytics dashboards

If you're using the Flags SDK, flag reporting happens automatically—no manual instrumentation required.

• Integrate flags with Runtime Logs
• Integrate flags with Web Analytics
• Learn about the Flags SDK