Service Catalog & Map
There is no topology to declare. Maple reads parent-child relationships out of the traces you already send, so a new service appears on the map the first time it is called.
The surface
Latency percentiles, error rate and throughput per service, over the range you picked. Sort by p99 and the row that needs you is the top row.

In motion
Each node carries its request rate, error rate and average latency. The flow along an edge is that edge's traffic, not decoration.
What it does
One endpoint, one key. Traces, logs, metrics and sessions land on the same trace id from the first request.