The Australian Banking Association (ABA) is an organization that helps banks (which are like piggy banks but for grown-ups) work together to make banking easier and safer for people like you and me.
Imagine you have some money and you want to keep it safe. So, you go to a bank and open an account. The bank takes care of your money and keeps it safe for you. But there are many banks in Australia and each bank has its own rules and way of doing things.
The Australian Banking Association helps all the banks work together and follow the same rules. This makes it easier for you and me to understand how banking works no matter which bank we use.
The ABA also helps banks work together to make sure our money is safe. They do this by setting rules and standards that all banks must follow to prevent bad people from stealing our money. They also help banks work together to make sure that if a bank has a problem, other banks can help it so that people like you and me don't lose our money.
In summary, the Australian Banking Association is like a big group of banks who work together to keep our money safe and make banking easier for all of us.