As part of the introduction to this chapter, we looked at the difference between stateful and stateless microservices. The Service Fabric application templates available are then further divided into Reliable Services (stateful/stateless) and Reliable Actors. When to use which one is something that will depend on the specific business requirement of your application.
To put it simply though, if you wanted to create a service that should be exposed to many users of your application at any one time, a Reliable Service would probably be a good fit. Think of a service exposing the latest exchange rates that can be consumed by many users or applications at once.
Again, looking back to the introduction of this chapter, we used the example of an online web store with a shopping cart. A Reliable Actor could be a good fit for every customer buying items...
