What is the use of the parameter "cqiformatIndicator"?

Hi All LTE/5G Experts.

What is the use of the parameter “cqiformatIndicator”?

cqi-FormatIndicator : Indicates whether the UE shall report a single (wideband) or multiple (subband) CQI.

Value Description (based on 38.214 - 5.2.1.4)
Wideband a wideband CQI is reported for each codeword for the entire CSI reporting band
Subband one CQI for each codeword is reported for each subband in the CSI reporting band…