1) You will learn to write music more consciously, guided not only by your ears, but also by the established rules and techniques of music theory.
2) You will raise your musical literacy: learn about the multitude of modes and keys, as well as different types and inversions of chords, get acquainted with intervals and generally understand music composition better.
3) You will get most of the knowledge taught in a music college for years, condensed into a short course and adapted for the needs of modern electronic producers and DJs, in one month.
Basic Music Theory is a straightforward way to grasp all the necessary fundamentals of music theory. There might be only 5 lessons, but that is usually adequate in order for someone to get a strong foundation of harmony and to enrich their musical vocabulary.