Deployment slots are a feature of Azure App Service that allow multiple instances of your app to run concurrently on a single instance of Azure App Service. Azure App Service offers two deployment slots per instance, giving you a maximum of four concurrent instances of your app.
Deployment slots give you the flexibility to scale up or down your app as needed. If you need to add more users or devices to your app, you can add more instances of Azure App Service and use the deployment slots to evenly distribute those users or devices across those instances.
If traffic in your app begins to increase, you can add more instances and leave some instances idle to reduce the load on the primary instance. .
There’s no need to worry about managing multiple versions of your app or dealing with capacity issues. Each instance of Azure App Service runs the latest version of your app and is automatically updated with any changes that are made to your code.
Overall, deployment slots give you the flexibility to easily scale up or down your app as needed without having to worry about managing multiple versions or capacity issues.
