multiple vectors: Internal focus - data programs like re-doing your customer master, pricing and product master. external focus - customer analytics, insights, product analytics that will drive better customer experience. $ focus - Reduction of churn, early warning signs, data sourced leads/pipeline generation
Three that come to mind: Customer Profitability - Data Quality needed for mapping Customer Revenue and Customer Expense Allocation. Customer 360 - bringing all customer data onto one dashboard for various customer facing persona's to have access. Employee On-boarding Process Improvements - making sure various data processes and policies are optimized for data quality.
Start first with understanding data lineage, usage and interdependence. Data visualization goes a long way in educating the relevant stakeholders to know their own data and ask the right question/draw insights. Customer 360, next best offer, propensity modeling, personalized product offering are all good use cases to get some early wins.