I-V-vi-IV Progression

Chord Progression: A series of chords played in succession that forms the harmonic foundation of a piece or section of music.

Roman Numeral Analysis: Roman numeral analysis is a system used to represent chords based on their relationship to the scale degrees rather than specific notes or keys.

Harmonic Function: Harmonic function refers to the role that a chord plays within a key or progression. It helps determine the overall tonal structure and emotional impact of the music.