hi antonius, "dps" means "degree per second", and is the physical unit of measure for a gyroscope. A gyroscope is a sensor that measures the angular rate (3 axial in this case) of a device moving and rotating together. From A3G4250 datasheed (link below), to get the output for e.g. the X axis (it means rotation around X axis) in dps concatenate the OUT_X_H and OUT_X_L, convert in 2's complement and multiply the data for 8.75 mdps/digit to obtain the output physical value. +-250dps Full Scale means that the sensor is able to measure ut to 250 dps of angular rate in bot axis directions.
Link: https://www.st.com/resource/en/datasheet/a3g4250d.pdf
