This can be a useful device in simplifying what is thought to be a challenging set of chord changes.
As you may know, one of John Coltrane's legacies is his exploration of the Descending Major 3rds Cycle, which resulted in his iconic classic "Giant Steps", as well as a number of reharmonizations of then contemporary Pop and Jazz Standards - such as "How High the Moon" ("Satellite") and Charlie Parker's "Confirmation" ("26-2"), among others.
Since the Major 3rds Cycle divides the octave into three equal tonal areas (C-Ab-E), Coltrane interposed a diatonc dominant before each (C Eb7-Ab B7-E G7), resulting in a strong dominant to tonic (V7 - I) harmonic resolution to each subsequent tonal center.