With so many transactions happening every day, banks in Indonesia are now using big data to better understand and serve their customers. Instead of just using surveys or feedback from branches, banks now collect a lot of customer data in real time. This includes things like spending habits, app usage, locations, and chats with customer service. The aim is to better understand what customers need and want. For example, if a customer shops online often and makes payments at night, the bank might sendtailoredoffers or choose better times to send app notifications. Big data also helps banks notice strange activity that could mean fraud, so they can act quickly to keep accounts safe.Besides improving customer service, big data also supports better decisions inside the bank. By looking at patterns from different areas and age groups, banks can create products for specific needs—like short-term savings for young workers or loans for small businesses. It also helps with judging risks and giving credit scores, especially for people who don’t have much banking history. This is important in Indonesia, where many people don’t use banks regularly. Still, using big data raises questions about privacy. Some customers may not know how much data they are sharing or how it’s being used. Because of this, banks need to be more open and careful. In this changing world, smart use of big data is a key way for banks to stay competitive and build stronger relationships with their customers.All of the following are mentioned in the text EXCEPT...