Linked from
The 13 pages that link to Bhajan, each with the reason it gives.
BhaktiRelated: Bhajans voice personal devotion through song.
HarmoniumRelated: Its sustained chords and melody make the harmonium a common bhajan accompaniment.
Purandara DasaRelated: His songs are widely suited to communal devotional singing.
Sai Baba of ShirdiRelated: Songs of devotion became a common way followers remember and praise him.