Metric data often has limited information to provide context for collected values. This challenge is addressed by Azure Monitor using multi-dimensional metrics. The dimensions of the metrics are name-value pairs that store additional data that describe the metric value. For example, a metric called available disk space could have a dimension called Drive with the values C:, D, stored inside. This value would allow the viewing of available disk space across all drives, or for each drive individually.

In the next section, we are going to create a metric in the Azure portal.