To allocate traffic between production and staging slots in an Azure App Service, what should you add to the service?

To effectively allocate traffic between production and staging slots in an Azure App Service, utilizing slots in the "Testing in Production" blade is essential. This feature allows you to route a portion of the incoming traffic to the staging slot, enabling you to validate updates in a live environment while maintaining the performance and stability of the production application. By adding slots and configuring traffic distribution, you can gradually roll out features, gather real-time feedback, and ensure that new changes will not negatively impact the user experience before fully deploying to production.

The other options do not directly pertain to traffic allocation between production and staging slots. While performance tests are valuable for assessing application behavior under load, they do not facilitate traffic management. A WebJob allows for background processing tasks within an App Service but isn't related to traffic distribution. Lastly, templates in the Automation script blade focus on infrastructure deployment and automation but do not serve the purpose of routing traffic between environments. Thus, adding slots to the Testing in Production blade is the most relevant and effective method for traffic allocation.