In RESTful APIs, we use standard HTTP verbs to indicate what we need to do with a particular resource. These verbs define what the client needs to do, but we need to answer in our microservice what response we give back.
For example, when a client asks for a specific customer using the URL http://localhost:8080/customer/1 with the HTTP verb GET, we can answer back with a status 200 OK, or with a 404 NOT FOUND, if we don't find the customer.
This two-way communication becomes part of a conversation between the client and the API and will form our ubiquitous language.
