Ganga Aarti is done by the pundits (priests) selected by Ganga Sabha. Ganga Sabha is NGO which is managing Ganga Aarti since it is started. Ganga Sabha is also manages the ghat along with help of govt.
Initially people start coming early to get good spot. Later they carried out the idol of River Ganga from the small temple located close to the ghat. Idol is normally carried out in "palkhi" by pundits and other people which they put on the platform of ghat near river ganga.
Ganga Aarti means prayer for River Ganga. Prayers are dedicated to gods and godesses. River Ganga is not just a river in India, It is Divine Mother. River Ganga gives life in the form of water. The same water also removes sins when you take a dip in its holy water. River Ganga also gives liberation to souls. Its not just a river but whole culture itself. Historically millions of people are living on the bank of the river ganga. For agriculture her water is still precious for India. River Ganga is considered godess which was originally living in heaven. Saint Bhagirath made a long meditation to give liberation to his ancestors (reduced to ashes due to curse of sage Kapil). He was blessed with Ganga by gods. Lord Shiva held her to reduce her mighty flow. Online Ganga Aarti Booking Haridwar