use of scale factor

[Staël Koumétio]

Isn't the scale factor automatically applied when a raster layer is loaded into QGIS? Indeed, in one of the videos provided as part of the MOOC "WaPOR Introduction (version 3)" it is explained how to apply the scale factor to a raster layer in the QGIS software which confuses me because in a previous video , it is said that the scale factor is the most