ADB can stand for different things depending on the context. In banking, ADB stands for Average Daily Balance, which is the average amount of daily balances over a certain period, usually one month. It is used to calculate fees and interest rates on bank accounts. To calculate ADB, you sum up all your balances at the end of each day for each qualifying month and divide it by the total number of days in the qualifying month.

On the other hand, ADB can also refer to the Asian Development Bank, which is a regional development bank established in 1966 to promote social and economic development in Asia and the Pacific. ADB provides loans, technical assistance, grants, and equity investments to its members and partners to achieve a prosperous, inclusive, resilient, and sustainable Asia and the Pacific, while sustaining its efforts to eradicate extreme poverty.