One of the most important motives were to expand their power and gain adherents to Christianity. The economic exchange and the search for gold and silver were some of the main reasons.
these explorations brought as a consequence, the creation of new routes, the resurgence of the urban life and of the commerce with the appearance of the Banks.
Charg-it was the first official charge card in that it allowed users to withdraw funds directly from their bank account. Almost all cards by MasterCard, Visa, etc. today are credit cards, not charge cards.
