Explanation:
Graphical user interface, table Description automatically generated

Allowed authentication methods: GET only
Authorization level: Anonymous
The option is Allow Anonymous requests. This option turns on authentication and authorization in App Service, but defers authorization decisions to your application code. For authenticated requests, App Service also passes along authentication information in the HTTP headers.
This option provides more flexibility in handling anonymous requests.
References:
https://docs.microsoft.com/en-us/azure/app-service/overview-authentication-authorization