Multilook and resolution GRD products

Good morning,

for GRD products, that is multilooked, which type of multilook has been used ? Temporal, in frequence etc?

Besides, for GRD, geometric resolution is in ground range in this page, is it right?
https://sentinel.esa.int/web/sentinel/user-guides/sentinel-1-sar/resolutions/level-1-ground-range-detected

Thanks in advance and excuse me for my several questions.