A metric is a unique combination of dimension and measure values.
While integrating Anodot you will define the dimensions and measures you wish to send to Anodot. The unique set of values for these combinations is the number of metrics you will be sending to Anodot.
An eCommerce customer may send number of purchases and revenues as measures and Product, State and Device OS as dimensions. The unique set of combinations between these dimensions will become his metric count.