What most people call music theory is really just the building blocks and terminologies for musical structures such as keys, scales, chords, and their relationships to one another. A good understanding of these musical configurations enhances one’s ability to learn, retain, compose, and improvise music in addition to being able to communicate fluently with other musicians by using proper terms and labels.
It’s tremendously empowering to understand the theory of what you’re playing on the guitar regardless of what style you’re working on, though some musical approaches benefit more from the knowledge of theory than others, such as composing and improvisation.
As much as possible, I emphasize music theory in my teaching method, often by analyzing and extracting information from a piece of music that someone is learning and creating exercises based on that information. Some students may desire a more thorough approach to learning the basic structures of music on the guitar which include practicing scales, arpeggios, and chord inversions in every position of every key.
If any of this sounds overwhelming to you, don’t worry! I only include information about music theory as it applies to what you're most excited about learning on the guitar until you're ready and interested in taking it to the next level.