It means they belong to that scale, and when the key of a song is "C", these are the notes to use. If their are any accidentals next to a note though, remember to raise or lower the note accordingly.
The notes in the C major scale are C, D, E, F, G, A, and B.
The notes of the C major scale on the guitar are C, D, E, F, G, A, and B.
A, B, C#, D, E, F#, and G# are the notes of the A major scale.
The notes of the A major scale are A, B, C, D, E, F, and G.
The names of the music notes in the C major scale are C, D, E, F, G, A, and B.
The notes in the C major scale from highest to lowest are C, D, E, F, G, A, and B.
The notes of the A major scale are A B C# D E F# and G#. The notes in an A major triad are A C# and E.
The C major scale and its relative minor, the A minor scale. C Major.
The C major scale uses only the white notes.
The notes in a major scale on the guitar are: A, B, C, D, E, F, and G.
A major scale consists of seven notes: C, D, E, F, G, A, and B.
The notes in the B major scale are B, C, D, E, F, G, and A.