What are music scale modes; well a mode of C Major would be any scale that uses the same notes as C, so if you know the C major scale you already know the 7 modes.
Let’s start from the first one which is Ionian, just play the C major scale as normal going from C to C, then comes Dorian the 2nd mode which goes from D to D, make sure you still use all the white notes. The 3rd mode Phrygian goes from (yep that’s right) the 3rd note of C major which is E.
You keep going through the music scale modes, the 4th one is Lydian, it goes from F to F, the 5th one is Mixolydian, it goes from G to G, the 6th one is Aeolian, it goes from A to A then the last one is Locrian which goes from B to B.
Yes I know they have very strange names but that’s just the way it is with music, it’s nice to know all the names and be able to string them off when you’re speaking to someone, if someone says to you “what are these things called modes” and then you say back to them “well there are 7 and they are Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian and Locrian” it’s great to see the look on their face.
But really you can just think of the music scale modes as being the 1st 2nd 3rd 4th 5th 6th and 7th modes of the major scale which is what they are. The only reason they sound different and are different is because they’re starting and ending on a different note, or in the case of a song, starting and ending on a different chord.