Hi. The Goal in using LST to expose the most possible Part of the PLant. iF THE Plant grows indoors in natural shape you cant expose all budites to the Light. With LST you expose abig number. Doing a SCROG you can expose the Most of the Budsites. The Goal is to open the Canopy and let the LIght penetrate, so the Buds can swell . LST is a very Soft method to increase the Size of your Buds, and helping them to maturate evenly. LST is abasic tool. It can be combines with other Methods like Topping and supercropping etc.
In my Experience all PLnats respond very well to LST if its performed in the Right stage of grow ( from around Week 3 of vegetation until around end of second week in flower)