Chords are three or more tones ringing together. And, two can sound together and still be a chord. And, a single tone is ultimately a ringing chord. Chords are the 'vertical' dimension of music. Another word for chords is harmony.
Chords can be strummed, fingerpicked as blocks/fragments, or arpeggiated [broken into individual tones by picking or fingerpicking each tone separately - the tones that are picked can ring together or not ring together].
Our main goals with chords
As we expand our catalog, we apply it to endless, real world scenarios...playing and writing progressions/songs & interpreting chord symbols.