The attainment ceremony was a Ferengi rite of passage into adulthood. Upon completion of the ceremony, young Ferengi males were to purchase apprenticeships under suitable role models, and thus enter into business.
In the attainment ceremony in the south of Ferenginar, fathers have their children fight a friend over a slip of latinum and take bets on the winner. (DS9 novel: Legends of the Ferengi, ST reference: Star Trek: Celebrations)
The attainment ceremony is one of many topics covered in Doctor Posck of the Ferengi Wellness Institute in his book Guarding Your Investment, Keeping Your Children Profitable. (DS9 novel: Legends of the Ferengi)
In 2381, Captain Jean-Luc Picard noted that the Ferengi DaiMon who had scavenged material from the Borg-destroyed ruins of Starbase Leonov looked barely older than the Age of Attainment. (TNG novel: Losing the Peace)