Chord progressions are sequences of chords played in a piece of music, forming the harmonic backbone of a song. They create a sense of movement and emotion, guiding the listener through the musical landscape. Common progressions, such as the I-IV-V or ii-V-I, are foundational in various genres, including pop, rock, and jazz. Understanding chord progressions is essential for musicians and composers, as they help establish the mood and direction of a piece. By experimenting with different progressions, artists can evoke various feelings and enhance their creative expression, making it a vital aspect of songwriting.