Visual Builder NOT display Values

I used Visual Builder and used the metric and table but 2 ways not display the value
Notice* : But Time Series display graph let see a picture below

TSVB gives you a snapshot of what's happening right now with your data. So the reason the table, metric, etc. are displaying 0 is because for the last interval in your time range, there is no data. You could try increasing your interval to actually contain data in the last interval.

Can you elaborate on that comment? I'm interpreting "TSVB" to mean "Time Series Visual Builder" which has "series" in the name. By definition time series data is not 'right now' so why is it that TSVB gives us a 'snapshot of what's happening right now' ?