The number chart type is great to use when you want to keep track of a specific value. For example, you want to see the GGR for the last 30 days.
The number chart type should only be used for a single measure (1 measure). To clarify, no dimensions, except time dimensions (w/o groupings), may be included.
In the above chart, we have one single measure [Gross Gaming Revenue] which is represented by the one and only value we can see: €9,848,825.68
Since we have no filters or time dimension added, the value/number represents GGR from all time.
Let's add a time dimension to our next example, to get the GGR value from the last 30 days instead.
In the above chart, we've kept the same measure as in the previous example [GGR], but we've added a time dimension to it: Last 30 days without grouping.
Instead of getting a value from all time, the value (€29,204.15) now represents the GGR from the last 30 days.
Let's get a country-specific GGR value in the next example.
In the above chart, we've kept the same measure [Gross Gaming Revenue] and time dimension [last 30 days] as in the previous example, but we've now got the GGR value only from players registered from Sweden.
So, the value €11,070.24 now represents the GGR from Swedish players in the last 30 days.