>>18764277A 'chord' is a grouping of musical notes that go together nicely. There's a mathematical bit that you can use involving a base-12 system and some rudimentary counting to create them.
For example, the chord "C Major" consists of the notes, C, E, and G. Every time a chord has just the notes of C, E, and G, no matter what order it's in, it will be C major.
A chord is kind of like a word, and notes are syllables.
A chord progression is a system of notation that makes conveying chords easier, by using a 'key' and roman numerals.
IE: (the long way to write it) C Major, to F Major, to G Major, to E minor, to C Major.
(The short way to write it) Key of C, I, V, IV, ii
It's kinda hard to understand if you don't know music, but if you listen, you can hear them.
