What does global temperature anomaly mean?

Anomaly is the difference between a value in a series of values and the average value, which can be divided into positive anomaly and negative anomaly.

The average temperature anomaly is the difference between a series of average temperatures (daily average temperature, monthly average temperature, etc.). ) and the total average temperature.

The increase of the average temperature anomaly means that the difference increases, and the temperature in the corresponding time period is abnormal.