How to use 7th chords effectively in music composition and performance?

To use 7th chords effectively in music composition and performance, incorporate them into chord progressions to add complexity and color to the sound. Experiment with different voicings and inversions of 7th chords to create interesting harmonies. Use 7th chords to create tension and resolution within your music, and consider their function within the overall harmonic structure of the piece. Practice playing and listening to 7th chords to develop a strong understanding of their sound and how to use them effectively in your compositions and performances.