I have published the new version of the User Manual of the Semi-Automatic Classification Plugin v. 4.3.0 for QGIS.
This new documentation illustrates the functions of the Semi-Automatic Classification Plugin v. 4.3.
I have improved the chapter about GIS and Remote Sensing with information about the classification algorithms and spectral distances.
I am going to write the basic tutorials very soon.
It is possible to download the User Manual (licensed under a Creative Commons Attribution-ShareAlike 4.0 Unported License) in English from this link. Also, an online version in English is available here.