Troubleshooting problems with GCS over gRPC is difficult without some telemetry indicating how the client is configured, and what load balancing information was available to the gRPC library.
When this option is enabled (the default), the GCS client will export the gRPC telemetry discussed in gRFC/66 and gRFC/78 to Google Cloud Monitoring. Google Cloud Support can use this information to more quickly diagnose problems related to GCS and gRPC.
Sending this data does not incur any billing charges, and requires minimal CPU (a single RPC every few minutes) or memory (a few KiB to batch the telemetry).
