Knowing music theory will help you to read music.
It seeks to identify patterns and structures in composers' techniques, across
or within genres, styles, or historical periods. In a grand sense, music theory distills and analyzes the fundamental parameters or elements of
music–rhythm, harmony (harmonic function), melody, structure, form,
i. Basic to advanced level Trinity and Royal School - Syllabus grade 1-8
ii. Learning music theory to communicate with other musicians
iii. A knowledge of music theory gives you a context for the music you are playing