Bhakti and Yoga are Sanskrit words, the meaning of word Yoga is union and the meaning of Bhakti is divine love, i.e. love with Brahma or love with the ultimate power.
Devotion is not what we do or what we have - but what we are. Knowledge of this consciousness is Bhakti yoga. Experience of the Supreme Consciousness and nothing else. The separation of I from everything shows the different form, forget about everything, The obliteration of all the identity given by the world, and the world also. The meeting with that ultimate consciousness, the endless universal love, the inner view of self, the experience these things in every moment is the real Bhakti Yoga.
Bhakti yoga is a vibrant feeling of uniformity with God.