Respond to some questions about THREESCALE-3159 for THREESCALE-4915

The questions so far are the following.

1. Can you confirm that there are two different Analytics for products and backends.
2. The title of the page for backends is Traffic. What exactly is measured?
3. What are the prerequisites to have this analytics page working: a backend, and something else?
4. Does the analytics page show details of a backend per product or how can I distinguish the traffic for backends connected to more than one product?
5. What do you think about placing details about the Backend Analytics page in this chapter >> https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.8/html-single/admin_portal_guide/index#api-analytics-3scale
6. Any other details that you consider important.