This document discusses how data science can be used to enhance customer experiences and business opportunities for banks. It provides examples of problems banks face around dormant accounts, cross-selling, and irrelevant offers. It then describes how various data analysis techniques like clustering, recommendations engines, and outlier detection can be applied to transaction data to better understand customers and their needs in order to increase engagement and sales. The key applications of data science highlighted are personalized offers, reviving dormant accounts, identifying new opportunities, and enhancing cross-selling capabilities.